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

Construction : Through A, draw a line parallel to BC of ∆ ABC Proof: DE||BC and AB is transversal Angle ABC = Angle BAD ------------- (1) Angel ACB = Angel CAE ---------------(2) Add eq. (1) and (2) ABC + ACB = BAD +CAE Adding angel BAC both sides we get ABC+ ACB+BAC=BAD+CAE+BAC But, BAD + CAE+ BAC = DAE = 180° [ DAE is a straight angle] ABC +ACB+BAC = 180° Hence, the sum of the angles of a ∆ is 180°

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How much of tape is needed for all the 12edges

Posted by Tejaswini S 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Tejaswini S 8 years, 4 months ago

320cm of tape (calculate the sum of all the edges (The 12 edges consist of 4 lengths, 4breadths and 4heights

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Parallelograms formulas

Posted by Rishi Kumar 8 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Pankaj Verma 8 years, 4 months ago

Area: b×h perimeter: 2 (l+b)

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Mahima K 8 years, 4 months ago

Area : b ×h Perimeter: 2 (l + b)

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whole cube of (a+b)

Posted by Chandan Kumar 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Ujjawal Kumar 8 years, 4 months ago

(a)3+(b)3+3ab(a+b)

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X^2+x+1 factrise

Posted by Ashu Trivedi 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

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Two opposite angles of a parallelogram are 3x-2 and 63-2x. Find all the angles of a parallelogram.

Posted by Apurvi Jain 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

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What is the surface area of cylinder ??

Posted by Suyash Pandey 8 years, 4 months ago

CBSE > Class 09 > Mathematics

5 answers

Pankaj Verma 8 years, 4 months ago

2 pie rh

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Bharti Goyal 8 years, 4 months ago

2 pie r(r+h)

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Yash Agarwal 8 years, 4 months ago

2πrh

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Suyash Pandey 8 years, 4 months ago

0Thank You

Abp Rebels 8 years, 4 months ago

2×22÷7×r×h

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If diagonals of a cyclic quadrilateral are diameters of the circle through the vertices of the quadrilateral ,prove that it is a rectangle

Posted by Aneesa Bint 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Ayush Choudhary 8 years, 4 months ago

From which book is the question from it is never?

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Ac= Ae

Posted by Nilesh Rajput Rajput 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

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AC=AE,AB=AD and angleBAD=angle Eac. Show that Bc=DE

Posted by Nilesh Rajput Rajput 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Pankaj Verma 8 years, 4 months ago

Very simple??

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Which no . written by Ramanujam

Posted by Anupam Tiwari 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gumpu Ramakrishna 8 years, 4 months ago

1729

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2+2=4y

Posted by Akshit Sharma 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Rahul Gupta 8 years, 4 months ago

4=4y y=1

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Two different circle not intersect more than two point video

Posted by Aditya Kumar 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

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If (2,3) and (4,0) lie on the graph of equation ax+ by=0. find the value of A and B. Plot the graph of equation obtained

Posted by Priyank Gupta 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Find zeros of the polynomial Z2-8

Posted by Kanchan Yadav 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Anuradha Mishra 5 years, 3 months ago

find zero z^2-8

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Is there anyone have the maths paper NCERT of 50 mks....

Posted by Bushra Panjekash 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Y coordinates of the point is zero where the point lies

Posted by Mady Kotalwar 8 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Somyajit Dalai 8 years, 4 months ago

Y axies

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Bhoomi 8 years, 4 months ago

On the 'x' axis.. the abscissa.

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intersected

Posted by Rajiv Ranjan 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

What is hictogram

Posted by Mayank Bisht 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

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The mean of 10observations is 15 if 3 is added each of first five observation find the new observation?

Posted by Rishabh Gupta 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Mukul Pawar 8 years, 4 months ago

The no. Of observation is same but mean is changed from 15 to 16.5

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AB+BC=AC

Posted by Ritesh Kumar Singh 8 years, 4 months ago

CBSE > Class 09 > Mathematics

3 answers

Palak Jain 8 years, 4 months ago

Yes AB +BC =AC

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Tejal C 8 years, 4 months ago

Yupp

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Mani Kandan 8 years, 4 months ago

AB+BC=AC

1Thank You

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In the given figure AD>AB and AC is the bisector of angle A show that angleACD>angle AC B

Posted by Monika Shrivas 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Mukul Pawar 8 years, 4 months ago

AD>AB. Then opposite angle ACD of side AD is greater then opposite angle ACB of side AB. Reason is larger side has larger opposite angle

1Thank You

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Please told me what Is Newton's law of motion Please answer my question its very urgent...plase

Posted by Bushra Panjekash 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The volume of right circular cone is 9856m^3 and the area of its base is 616cm^2 find slant heigjt of the cone

Posted by Anmol Soni 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Rajeev Malhotra 8 years, 4 months ago

volume of cone = π{tex}r^2h/3{/tex}

{tex}πr^2h/3{/tex} = 9856

616xh/3 = 9856

h= 9856 x3/616

h = 16 x3

h =48 cm

{tex}πr^2 = 616{/tex}

{tex}22. r^2/7 =616{/tex}

{tex}r^2 {/tex} = 616 x7 /22

{tex}r^2{/tex} = 28 x7

r = 14 cm

{tex}slant height l = (h^2 + r^2)^1/2{/tex}

{tex}l = (14^2 + 48^2)^1/2{/tex}

{tex}l= (196+2304)^1/2{/tex}

{tex}l = (2500)^1/2{/tex}

l = 50 cm

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Rational numbers of 7 and 8

Posted by Harsh Attri 8 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

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At an examination in which full marks were 500. A got 10% less than B, B got 25% more than C and C got 20% less than D. If A got 360marks, what percentage of full marks was obtained by D?

Posted by Devanshu Shrivastava 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Yes No 8 years, 4 months ago

I m not sure but is it 71.28%?

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The median of the observation 11,12,14,18,x+2,x+4,30,32,35,41 arranged in ascending order is 24. Find value of x.

Posted by Arin Sharma 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Arin Sharma 8 years, 4 months ago

X=21

1Thank You

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