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.

1Thank You

Krishna Dubay 5 years, 4 months ago

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

1Thank You

Yogita Ingle 5 years, 4 months ago

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

1Thank You

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, 4 months ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years, 4 months 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.

1Thank You

ANSWER

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, 4 months ago

CBSE > Class 08 > Mathematics

3 answers

Diksha Laniya🐥 5 years, 4 months ago

Hi rahul sahu and Khushi singh

1Thank You

Rahul Sahu 5 years, 4 months ago

Answer is right

2Thank You

Diksha Laniya🐥 5 years, 4 months ago

ANSWER

2Thank You

ANSWER

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, 4 months ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years, 4 months 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

0Thank You

ANSWER

Is 128 not a perfect cube

Posted by Basi Reddy Police Patil 5 years, 4 months ago

CBSE > Class 08 > Mathematics

5 answers

Prasad Naik 5 years, 4 months ago

0Thank You

Zibiah Gonsalves 5 years, 4 months ago

In simple words, it is not a perfect cube

0Thank You

Divyansh Jain 5 years, 4 months ago

No, 128 is not a perfect cube.

0Thank You

Rachana H 5 years, 4 months 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.

1Thank You

Diksha Laniya🐥 5 years, 4 months ago

0Thank You

ANSWER

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, 4 months ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years, 4 months 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

0Thank You

ANSWER

12.1raise to2 -7.9raise to the power 2

Posted by Anushree Singh 5 years, 4 months ago

CBSE > Class 08 > Mathematics

1 answers

Diksha Laniya🐥 5 years, 4 months 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.

0Thank You

ANSWER

5.8×1012

Posted by Nilesh Meghwal Lunol Nilesh Meghwal 5 years, 4 months ago

CBSE > Class 08 > Mathematics

3 answers

Krishna Dubay 5 years, 4 months ago

5.8 Multiply by 1012 = 5867.6

0Thank You

Mayank Dhiman 5 years, 4 months ago

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

0Thank You

Prachi Sahu 5 years, 4 months ago

5869.6

1Thank You

ANSWER

Multiply 4xy,xy,3/2 x2y

Posted by Manisha Lalchandani 5 years, 4 months ago

CBSE > Class 08 > Mathematics

2 answers

Diksha Laniya🐥 5 years, 4 months ago

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

0Thank You

Manisha Lalchandani 5 years, 4 months ago

Pls tell me answer

1Thank You

ANSWER

What is a regular plugin?

Posted by Aman Singh 5 years, 4 months ago

CBSE > Class 08 > Mathematics

2 answers

Aman Singh 5 years, 3 months ago

Yes

1Thank You

Tanishka Meena 5 years, 4 months ago

You mean to say what is regular Polygon

1Thank You

ANSWER

Find the value of 2–³

Posted by Anu Singh 5 years, 4 months ago

CBSE > Class 08 > Mathematics

5 answers

Manisha Lalchandani 5 years, 4 months ago

-8

3Thank You

Naurin Fathima 5 years, 4 months ago

-8

2Thank You

Aman Singh 5 years, 4 months ago

-8

2Thank You

Aakash Yadav 5 years, 4 months ago

Thanks

1Thank You

Diksha Laniya🐥 5 years, 4 months ago

Answer: -8

3Thank You

ANSWER

2 +4

Posted by Xyz Xyz 5 years, 4 months ago

CBSE > Class 08 > Mathematics

5 answers

Cbse Student 5 years, 4 months ago

0Thank You

Manisha Lalchandani 5 years, 4 months ago

0Thank You

Sujal Gopinwar 5 years, 4 months ago

0Thank You

Zibiah Gonsalves 5 years, 4 months ago

0Thank You

Xyz Xyz 5 years, 4 months ago

0Thank You

ANSWER

What is natural number

Posted by Agrawal Lucky 5 years, 4 months ago

CBSE > Class 08 > Mathematics

5 answers

Gauri Sharma 5 years, 4 months ago

0Thank You

B Harshitha 5 years, 4 months ago

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

0Thank You

Sujal Gopinwar 5 years, 4 months ago

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

0Thank You

Kashish Sharma 5 years, 4 months ago

A number which starts from 1 is know as natural number

1Thank You

Zibiah Gonsalves 5 years, 4 months ago

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

2Thank You

ANSWER

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

Posted by Dipti Kataria 5 years, 4 months ago

CBSE > Class 08 > Mathematics

2 answers

Agrawal Lucky 5 years, 4 months ago

Hello

0Thank You

Aryan Gupta 5 years, 4 months 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

1Thank You

ANSWER

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, 4 months ago

CBSE > Class 08 > Mathematics

2 answers

Gaurav Seth 5 years, 4 months 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

0Thank You

Yogita Ingle 5 years, 4 months 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

0Thank You

ANSWER

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

Posted by Lalesh Rathod 5 years, 4 months 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, 4 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

Can a quadrilateral ABCD is a parallelogram if solution

Posted by Sanjeev Kumar 5 years, 4 months ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months 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.

0Thank You

ANSWER

Solve x=-3 y=2 2xy²-3xy+5yx-5

Posted by Niyati Mangela 5 years, 4 months ago

CBSE > Class 08 > Mathematics

2 answers

Sabiha Khatun 5 years, 4 months ago

Thanks

0Thank You

Yogita Ingle 5 years, 4 months 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

2Thank You

ANSWER

Etfg

Posted by Sudharamesh Sudharamesh 5 years, 4 months ago

CBSE > Class 08 > Mathematics

2 answers

Zibiah Gonsalves 5 years, 4 months ago

5×20×6×7=4200

1Thank You

Vaibhav Sharma 5 years, 4 months ago

0Thank You

ANSWER

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, 4 months ago

CBSE > Class 08 > Mathematics

1 answers

Aryan Gupta 8C 5 years, 3 months ago

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

0Thank You

ANSWER

What do you mean by mathematician

Posted by Suparna Ghosh 5 years, 4 months ago

CBSE > Class 08 > Mathematics

1 answers

Rachana H 5 years, 4 months 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.

2Thank You

ANSWER

Page 104 of 571

myCBSEguide

myCBSEguide

Test Generator

CUET Mock Tests

Download myCBSEguide App

All Courses

Other Websites

CBSE Courses

Resources

Corporate

NCERT Solutions

CBSE Sample Papers