Question

class-7 chapter 11 ,exercise 11.1​

Answer 1

Answer:

$x = 45$

Step-by-step explanation:

angle B = angle C = x ( Angles opposite to equal sides of an isosceles triangle are equal )

$x + x + 90 = 180 \: \: \: \: (angle \: sum \: property) \\ \\ 2x = 180 - 90 \\ 2x = 90 \\ \\ x = 45$