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Express in variables the things which are double of same thing.

Posted by Jatin Makhija 7 years, 10 months ago

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The straight line joining the midpoints of the diagonals of a trapezium is parallel to the parallel sides and is equal to half their difference

Posted by Pawan Jaiswal 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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How to insert 5 rational numbers b/w 0 and 1

Posted by Shivangi Singhal 7 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Rajeev Malhotra 7 years, 10 months ago

First rational number between 0 and 1 is = 0+1/2= 1/2

Second rational number between 0 and 1/2 is = 1+1/2/2= 1/4

Third rational number between 1/2 and 1 is = 1/2+1/2 = 3/2/2 = 3/4

fourth rational number between 3/4 and 1 is = 3/4+1/2= 7/4/2 = 7/8

Fifth rational number between 7/8 and 1 is = 7/8+1/2 = 15/8/2 = 15/16

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Rajnish Singh 7 years, 10 months ago

Hii

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If the curved surface area of hemisphere is 49.28 m find its radius and total surface area

Posted by Suraj Sathe 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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Rajeev Malhotra 7 years, 10 months ago

csa of hemisphere = 2π r²

2π r² = 49.28

2 *22/7 *r² = 49.28

r² = 49.28*7/44

r² = 7.84

r = √7.84 = 2.8

TSA = 3 π r²

TSA = 3*22/7*(2.8)²

= 3*22/7 *7.84

= 73.92 m²

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Sum of side of triangle is180°

Posted by Atharv Mane 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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Factorise 12a sq b -6ab sq

Posted by Jatin Makhija 7 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Jatin Makhija 7 years, 10 months ago

6ab(2a-b)

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Why is the TSA and LSA of sphere is 4πr2 and 6πr2 ?Why not 8πr2 or 10πr2?

Posted by Santosh James 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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Aahna Pushpa 7 years, 10 months ago

Ask who have made this chapter or formulla

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Construct triangle abc such that bc=8cm,angleb=45° ab-ac=3.5 cm

Posted by Farhan Farhan 7 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Aadya Das 7 years, 10 months ago

first take base bc=8cm. then construct angle xbc=45 then cut an arc of 3.5 cm at y taking b as centre. join cy. draw perpendiculars of cy. then mark the point A where perpendiculars of cy meet the line bx . join ca. finally you can get the triangle ABC.

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find the product 3/2.4/2.12/32

Posted by Prince Kumar 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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What is atom

Posted by Divya Sharma 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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Sumayya Muhammed 7 years, 10 months ago

Atom is an small particle..?

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Explain ch-circle

Posted by Rohit Kumar Chand 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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Hey guy's! !!

Posted by Aditya Kumar 7 years, 10 months ago

CBSE > Class 09 > Mathematics

9 answers

Ajay Kumar 7 years, 10 months ago

Bgp

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Moomal Kirad 7 years, 10 months ago

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Moomal Kirad 7 years, 10 months ago

Aditya tum kaha se belong kar te go

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Moomal Kirad 7 years, 10 months ago

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Aditya Kumar 7 years, 10 months ago

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Manisha Bhardwaj 7 years, 10 months ago

Gurgaon

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Manisha Bhardwaj 7 years, 10 months ago

gurga5

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Aditya Kumar 7 years, 10 months ago

From which state you belong

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Manisha Bhardwaj 7 years, 10 months ago

Hlo

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Root squre

Posted by Sumayya Muhammed 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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What is abssisa and coordinate of( 4,0)

Posted by Anshuman Singh 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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How to find square root of all numbers....

Posted by Sumayya Muhammed 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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Ex 10.5

Posted by Mohair Saini Saini Boy 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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What is the value of√2

Posted by Someshwar Singh Nirwan 7 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Rajnish Singh 7 years, 10 months ago

1.414

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12.2

Posted by Abhay Khagwal Abhay Khagwal 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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Write one rational and one irrational numbers between 2016 and 2017

Posted by Sonu Chaudhary 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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The diameter of the two right circular cones are equal if their slant heights are in the ratio 3 :2, then what is the ratio of their curved surface areas?

Posted by Deepkant Singh 7 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Akash Dhar 7 years, 10 months ago

3:2

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Factorize:- 2x^2-5/6x+1/12

Posted by Shubham Achary 4 years, 6 months ago

CBSE > Class 09 > Mathematics

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Find the percentage increased in the area of triangle if it's each side is doubled

Posted by Shubham Achary 7 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Saswat Pratik Dash 7 years, 10 months ago

Let a,b,c be the sides of the original ∆ & s be its semi perimeter. S= (a+b+c)/2 2s= a+b+c.................(1) The sides of a new ∆ are 2a,2b,2c [ given: Side is doubled] Let s' be the new semi perimeter. s'= (2a+2b+2c)/2 s'= 2(a+b+c) /2 s'= a+b+c S'= 2s. ( From eq 1)......(2) Let ∆= area of original triangle ∆= √s(s-a)(s-b)(s-c).........(3) & ∆'= area of new Triangle ∆' = √s'(s'-2a)(s'-2b)(s'-2c) ∆'= √ 2s(2s-2a)(2s-2b)(2s-2c) [From eq. 2] ∆'= √ 2s×2(s-a)×2(s-b)×2(s-c) = √16s(s-a)(s-b)(s-c) ∆'= 4 √s(s-a)(s-b)(s-c) ∆'= 4∆. (From eq (3)) Increase in the area of the triangle= ∆'- ∆= 4∆ - 1∆= 3∆ %increase in area= (increase in the area of the triangle/ original area of the triangle)× 100 % increase in area= (3∆/∆)×100 % increase in area= 3×100=300 % Hence, the percentage increase in the area of a triangle is 300% ================================================================ Hope this will help you.....

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Rajnish Singh 7 years, 10 months ago

400 percent

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Explain me the graph of frequency polygon

Posted by Lokesh Puri 7 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Ashutosh Mahanta 7 years, 10 months ago

Frequency polygon is another method of representing frequency distribution graphically . Frequency polygon of a given frequently distribution can be drawn in two ways : (i)By using histo-gram. (ii)without using histo-gram.

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In Tring let ABC AB is the miden and E is the mid point AD B join to produce AC of F. Prove that AF=1/3 AC.

Posted by Ashutosh Singh Singh 7 years, 10 months ago

CBSE > Class 09 > Mathematics

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3 Difference between simple rhombus and square

Posted by Milli Shah 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 4 years, 6 months ago

Although square and rhombus are quadrilateral and a parallelogram and have many similarities between them. But with these similarities, there are also some differences between them.

Some most important differences between a square and rhombus are :

Square has 4 right angles whereas rhombus does not have any right angle
The sides of a square are perpendicular to each other whereas the sides of a rhombus are not perpendicular to each other.
All the angles of a square are equal whereas only the opposite angles of a square are equal.
The two diagonals of a square are always equal in length while the two diagonals of a rhombus are unequal

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Find the length of each side of an equilateral triangle having an area of 9 *root over 3 CM square

Posted by Arif Ahmed 7 years, 10 months ago

CBSE > Class 09 > Mathematics