Chapter 12 : Isosceles Triangle - Frank Solutions for Class 9 Maths ICSE

Mathematics in ICSE Class 9 is one of the most challenging and trickiest subjects of all. It includes complex topics such as logarithms, expansions, indices and Pythagoras Theorem which are difficult to understand for an average student. TopperLearning provides study materials for ICSE Class 9 Mathematics to make the subject easy and help students to clear all their concepts. Our study materials comprise numerous video lessons, question banks, revision notes and sample papers which help achieve success in the examination.

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Chapter 12 - Isosceles Triangle Excercise Ex. 12.1

Question 1
Solution 1
Question 2
Solution 2
Question 3
Solution 3
Question 4

Find the interior angles of the following triangles:

Solution 4

Question 5

Find the interior angles of the following triangles:

Solution 5

 

Question 6

Find the interior angles of the following triangles:

 

Solution 6

 

Question 7

Find the interior angles of the following triangles:

Solution 7

Question 8
Solution 8
Question 9
Solution 9
Question 10
Solution 10
Question 11
Solution 11
Question 12

Solution 12

Question 13

Solution 13

Question 14
Solution 14
Question 15
Solution 15
Question 16
Solution 16
Question 17
Solution 17
Question 18
Solution 18

Question 19
Solution 19

Question 20
Solution 20
Question 21
Solution 21
Question 22
Solution 22
Question 23

In the given figure, D and E are points on AB and AC respectively. AE and CD intersect at P such that AP = CP. If BAE = BCD, prove that DBDE is isosceles.

Solution 23

Question 24

In DPQR as shown, PQS = RQS and QS PR. Find the value of x and y, if PQ = 3x + 1; QR = 5y - 2; PS = x + 1 and SR = y + 2.

Solution 24

Question 25

In the given figure :

if PQS = 60o,

a. find QPR.

b. show that PQ = PS = QS = SR

Solution 25

Question 26

In the give figure, if DPQR is an isosceles triangle, prove that: QSR = exterior PRT.

Solution 26

Question 27

In the given figure, if DABC is an isosceles triangle and PAC = 110o, find the base angle and vertex angle of the DABC.

 

Solution 27

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