CBSE > Class 08 > Mathematics | CBSE Board | Homework Help

A regular polygon has equal length sides with equal angles between each side. Any other polygon is an irregular polygon, which by definition has unequal length sides and unequal angles between sides. Circles and shapes that include curves are not polygons - a polygon, by definition, is made up of straight lines.

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Krishna Dubay 5 years ago

Regular polygon :- The regular polygon has all sides and all angle are equal

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Yogita Ingle 5 years ago

Regular Polygons: A regular polygon is equiangular (angle between any two vertices is equal) and equilateral (length of each vertices is equal).

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ANSWER

A building has the height of 23/2 meter building and second building height of 2/4inch find the height of second building in metre

Posted by Gauri Sharma 5 years ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years ago

ANSWER Let h= height of second tower, d=distance between two towers height of first tower = 30 m From given data, d30=tan60∘=3 dh=tan30∘=31 3h=d,30=d3 h=10 m, d=103 m Therefore, height of the other tower is 10 m.

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From 8 x cube minus 7 x + 8 x square - 3 takeaway 7 + 8 x + 7 x + x cube

Posted by Kartik Singh 5 years ago

CBSE > Class 08 > Mathematics

3 answers

Diksha Laniya🐥 5 years ago

Hi rahul sahu and Khushi singh

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Rahul Sahu 5 years ago

Answer is right

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Diksha Laniya🐥 5 years ago

ANSWER

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a man sells a sofa set at a gain of 5% if he sold it for rupees 490 less he would have loss 2% find the SP of sofa

Posted by Atul Kumar 5 years ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years ago

ANSWER Suppose C.P of the sofa set =Rs.x Gain =5% ∴S.P=Rs.100(100+5)×x=Rs.2021x Loss =2% ∴S.P=Rs.100(100−2)×x=Rs.5049x Difference in two S.P.s=Rs.(2021x−5049x)=(100105−98)x=Rs.1007x If difference in S.P is Rs.1007x, then C.P=Rs.x If difference in S.P is Rs.490,then C.P =Rs.7×xx×490×100=Rs.7000 Hence the C.P of sofa set is Rs.7000

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Is 128 not a perfect cube

Posted by Basi Reddy Police Patil 5 years ago

CBSE > Class 08 > Mathematics

5 answers

Prasad Naik 5 years ago

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Zibiah Gonsalves 5 years ago

In simple words, it is not a perfect cube

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Divyansh Jain 5 years ago

No, 128 is not a perfect cube.

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Rachana H 5 years ago

Grouping the prime factors of 128 into triples, we are left over with 2 as ungrouped factor. ∴ 128 is not a perfect cube. Grouping the prime factors of 1000 into triples, we are not left over with any factor. ∴ 1000 is a perfect cube.

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Diksha Laniya🐥 5 years ago

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A Rectangular closed box is to be covered with a decorative paper of three of the surface areas of the faces of the box are 12xy ,16xy and 25xy. Write a polynomial that expresses the total surface area of the box in terms of xy

Posted by Anushree Singh 5 years ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years ago

ANSWER If the box is oped then we LSA of cabold should be applied here. area = LSA (area of 4 walls ) + one of base area = 2(1+b)h+1×b =2(28+50)20+28×50 =2×78×20+28×50 =3120cm2+1400cm2 =4520cm2

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12.1raise to2 -7.9raise to the power 2

Posted by Anushree Singh 5 years ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years ago

To use this calculator, simply enter a number and then raise it to a power. For example, if you wanted to calculate 103 enter 10 in the numbers box and 3 in the exponent or power box. The calculator will then compute 10x10x10 and give you the answer 1000. The History Window gives you a convenient way to store your results. When you have a result that you'd like to keep simply click the + Add to history button. You can easily select, copy, and paste from that window. If you put a minus in front of the number then you will get a positive or negative result depending on whether the power is an even or an odd number. Even powers will give you a positive result whereas odd powers will give you a negative result. This is because a minus number times a minus number gives you a positive answer. If you put a minus in front of the power then you will get an inverse (i.e one divided by the number raised to that power. For example, if you put 2 in the numbers box and you put -3 in the power box you get 2-3 which is equal to 1/2x2x2 = 1/8 = 0.125.

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5.8×1012

Posted by Nilesh Meghwal Lunol Nilesh Meghwal 5 years ago

CBSE > Class 08 > Mathematics

3 answers

Krishna Dubay 5 years ago

5.8 Multiply by 1012 = 5867.6

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Mayank Dhiman 5 years ago

Simple multiply 58with 1012 than put a point after one digit in answer

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Prachi Sahu 5 years ago

5869.6

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ANSWER

Multiply 4xy,xy,3/2 x2y

Posted by Manisha Lalchandani 5 years ago

CBSE > Class 08 > Mathematics

2 answers

Diksha Laniya🐥 5 years ago

ANSWER Product of 3x2y and −4xy2 =3x2×(−4xy2) =−12x2+1y1+2 =12x3y3

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Manisha Lalchandani 5 years ago

Pls tell me answer

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ANSWER

What is a regular plugin?

Posted by Aman Singh 5 years ago

CBSE > Class 08 > Mathematics

2 answers

Aman Singh 5 years ago

Yes

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Tanishka Meena 5 years ago

You mean to say what is regular Polygon

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ANSWER

Find the value of 2–³

Posted by Anu Singh 5 years ago

CBSE > Class 08 > Mathematics

5 answers

Manisha Lalchandani 5 years ago

-8

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Naurin Fathima 5 years ago

-8

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Aman Singh 5 years ago

-8

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Aakash Yadav 5 years ago

Thanks

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Diksha Laniya🐥 5 years ago

Answer: -8

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2 +4

Posted by Xyz Xyz 5 years ago

CBSE > Class 08 > Mathematics

5 answers

Cbse Student 5 years ago

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Manisha Lalchandani 5 years ago

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Sujal Gopinwar 5 years ago

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Zibiah Gonsalves 5 years ago

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Xyz Xyz 5 years ago

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ANSWER

What is natural number

Posted by Agrawal Lucky 5 years ago

CBSE > Class 08 > Mathematics

5 answers

Gauri Sharma 5 years ago

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B Harshitha 5 years ago

The number starts from 1 and it is uncountable . Can't able to find

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Sujal Gopinwar 5 years ago

The number which starts from 1 and doesn't end are known as natural number

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Kashish Sharma 5 years ago

A number which starts from 1 is know as natural number

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Zibiah Gonsalves 5 years ago

A number which occurs from 1 to infinity is a natural number

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N/2 - 3n/4 - 5n/6 = 21 then n=?

Posted by Dipti Kataria 5 years ago

CBSE > Class 08 > Mathematics

2 answers

Agrawal Lucky 5 years ago

Hello

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Aryan Gupta 5 years ago

First take out the LCM of the denominators in LHS, i.e., 2, 4 and 6. It is 12. Then divide the 12 by 2 and multiply by the numerator, that is, n. You will get 6n/12. Do it with other 2 fractions also. Now, solve the LHS. Which would be... -25n/12. Now the equation is -25n/12= 21. Take, 12 other side and multiply with 21 and divide -25 by (21×12). Therefore, n= -525/25

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In a parallelogram ABCD the point of intersection of both diagonals AC and BD is O. If AC=16 cm and BD=12cm then what is OA and OD.

Posted by Bhakti Raiyani 5 years ago

CBSE > Class 08 > Mathematics

2 answers

Gaurav Seth 5 years ago

∵ When diagonal AC and BD intersect each other at point o,

then OA = OC = (1/2) AC

And OB = OD = (1/2) BD

∴ OA = 1/2 × AC = 1/2 × 12 = 6 cm

and OB = 1/2 × BD = 1/2 × 9 = 4.5 cm

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Yogita Ingle 5 years ago

∵ When diagonal AC and BD intersect each other at point o,

then OA = OC = (1/2) AC

And OB = OD = (1/2) BD

∴ OA = 1/2 × AC = 1/2 × 16 = 8 cm

and OB = 1/2 × BD = 1/2 × 9 = 4.5 cm

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ANSWER

Ls 9 exercise 9.2 question no. 4 second answer I want

Posted by Lalesh Rathod 5 years ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Simplify the following 1) 3(4x²-y)+1 2) (3x-2)(4x+2xy+3) 3) (ax+bx+c)(a+b+c)

Posted by Niyati Mangela 5 years ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Can a quadrilateral ABCD is a parallelogram if solution

Posted by Sanjeev Kumar 5 years ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 5 years ago

(i) ∠D+∠B=180∘
It may or may not be possible. the sum of measure of adjacent angles should be 180∘.

(ii) AB=DC=8 cm, AD=4 cm and BC=4.4 cm
No, opposite sides are of different lengths.

(iii) ∠A=70∘ and ∠C=65∘
No, opposite angles should be equal.

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Solve x=-3 y=2 2xy²-3xy+5yx-5

Posted by Niyati Mangela 5 years ago

CBSE > Class 08 > Mathematics

2 answers

Sabiha Khatun 5 years ago

Thanks

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Yogita Ingle 5 years ago

Put x=-3 y=2

2xy²-3xy+5yx-5

= 2 (-3) (2)² - 3 (-3)(2) + 5(-3)(2) - 5

= (-6) (4) + 18 - 30- 5

= - 24 + 18 - 35

= -6 - 35

= - 41

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Etfg

Posted by Sudharamesh Sudharamesh 5 years ago

CBSE > Class 08 > Mathematics

2 answers

Zibiah Gonsalves 5 years ago

5×20×6×7=4200

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Vaibhav Sharma 5 years ago

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Find the greatest comman factor of the following monomial: i) xy,x²y and xyz. ii) 4 x ² y and 12x²y²

Posted by Krishna Kanwar Kalyanwat 5 years ago

CBSE > Class 08 > Mathematics

1 answers

Aryan Gupta 8C 5 years ago

(1) xy is HCF in both. (2) 4x^2y is HCF in both

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ANSWER

What do you mean by mathematician

Posted by Suparna Ghosh 5 years ago

CBSE > Class 08 > Mathematics

1 answers

Rachana H 5 years ago

A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change.

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