Question

In the given figures, find x, y or z (whichever is required).
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Answer 1

SINCE IT IS AN ISOSCELES TRIANGLE

...

Z IS ALSO 40⁰

( BECAUSE ANGLES OPPOSITE TO EQUAL SIDES ARE EQUAL ) .

ALSO ,

X +Y + Z = 180⁰ ( ANGLE SUM PROPERTY OF A TRIANGLE )

X +40⁰ + 40⁰ = 180⁰

X = 100⁰

Answer 2

As it is an isoceles triangle ..
y==z
Z=40

X+Y+Z=180
X=100 degree.