CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

Formula of the surface area of cuboid = 2(lb+bh+hl) 2(14*11+11*h+h*14)=758 2(154+11h+14h)=758 2*154+2*11h+2*14h=758 308+22h+28h=758 308+50h=758 50h=758-308 50h=450 h=450/50 = 9 h=9 cm, square = answer .

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Prove that angle opposite the equal sides of an isosceles triangle are equal

Posted by Khushi Singh 5 years ago

CBSE > Class 09 > Mathematics

3 answers

Piyush Tyagi 5 years ago

This answer is proved by side angle side

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Nishant Parashar 5 years ago

Can be proved by SAS congruence

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Shabana Shabeeh 5 years ago

In triangle

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a cone and hemisphere has equal radius and volume. find the ratio of their heights

Posted by Kala Sharma 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Rishi Dara 5 years ago

Let the radius of both cone and hemisphere be r cm. Let h height of the cone. Hence, the ratio of the heights of a cone and hemisphere is 2 : 1.

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How to verify x-cube,+ y-cube =(x+y)(x-square -- xy+y-square )

Posted by Soumya Doranahalli 5 years ago

CBSE > Class 09 > Mathematics

0 answers

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prove that 2 lines cannot have more than one point in common

Posted by Govind Satija 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Kaif Khan 5 years ago

There are 3 cases in between 2 lines are - • If both lines are parallel to each other then there is no common point . Because they will never meet to each other . • If both lines are intersecting each other anywhere there is one and only one common point . • If both lines are coincide with each other there are infinite common point . Note :- Go and read Euclid's postulates thoroughly and try to understand well from 5 postulate of Euclid's .

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If the non parallel sides of a trapezium are equal.prove it is cyclic

Posted by Kkoustuve Hota 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Chandraprakash Singh Sisodiya 5 years ago

Given - AB || CD , AD = BC T.P. - ABCD is a cyclic Construction - BE || AD Proof - Here AB||CD & AD = BC ABED is a parallelogram => BAD = BED - 1 eq. Also AD =BC = BE Therefore ,. BE = BC Angle BEC = angle BCE - 2 eq. Now, angle BED + angle BEC = 180 ( L.P. ) angle BAC + angle BCE = 180 ( from 1 & 2eq. ) angle A + angle C = 180 Therefore ,. ABCD is a cyclic.

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Prove that the sun of the either part of opposite angles of a cyclic quadrilateral is 180 degree

Posted by Om More 5 years ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

x=5y

Posted by Harnit Gautam 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Piyush Tyagi 5 years ago

X. 5 y then y -5

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ABCD is a parallelogram if angle A=65°,angle B+angleD

Posted by Alok Singh 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Ranjubala Nayak 5 years ago

50 degree

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ABCD is a parallelogram if angle A=65°angle B+angle Q

Posted by Alok Singh 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Piyush Tyagi 5 years ago

B+angleq. 115

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An example of whole number

Posted by Amrit Kaur 5 years ago

CBSE > Class 09 > Mathematics

2 answers

Shashaank Malviya 5 years ago

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Archana Gupta 5 years ago

0 to infinity

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If 1/7 =0.142857142857142857......... And so on, find 7/4

Posted by Joshua Fernandes 5 years ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

What is complementry angle.

Posted by Tarshit Kumar 5 years ago

CBSE > Class 09 > Mathematics

2 answers

Shivangi Pandey 5 years ago

Angles whose sum is 90° are called complementry angle.

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Joshua Fernandes 5 years ago

Angled whose submission is 90° are called complementary angles

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Square root of 110.25/4

Posted by Prabhjot Singh 5 years ago

CBSE > Class 09 > Mathematics

2 answers

Ritik Mishra 5 years ago

5.25

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Yogita Ingle 5 years ago

Square root of 110.25 is 10.5 and

Square root of 4 is 2

So, Square root of 110.25/4 = 10.5/2 = 5.25

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If x-y+z=5 and xy+y-zx=-7 then find the value of x cube -y cube + z cube +3xyz

Posted by Anjali Kanyal 5 years ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

What is a segment in circle

Posted by Surendra Sharma 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Mahek Gupta 5 years ago

When you draw a chord then the area between the circumference and the chord is the segment

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Tryangle ka 3 side are equl to180

Posted by Suraj Rawat 5 years ago

CBSE > Class 09 > Mathematics

4 answers

Queen Of The World 5 years ago

180 is the sum of all angles

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Queen Of The World 5 years ago

180 is the exterior angle

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Anurag Verma 5 years ago

Yes the sum of triangle is 180

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Suraj Rawat 5 years ago

KVzubxxinlagzbznknbones su pphul la La aall la DJ gk ko noon hv child

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What is Euler's formula

Posted by Bajendra Narayan Sahoo 5 years ago

CBSE > Class 09 > Mathematics

1 answers

Meghna Thapar 4 years, 11 months ago

This theorem involves Euler's polyhedral formula (sometimes called Euler's formula). The number of vertices V, faces F, and edges E in a convex 3-dimensional polyhedron, satisfy V + F - E = 2.

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D and E are the mid-points of side AB and AC , respectively of triangle ABC . If the perimeter of triangle ABC =38cm . Find the perimeter of triangle ADE

Posted by Yuvraj Singh 5 years ago

CBSE > Class 09 > Mathematics