Question

maths solve by picture ​

Answer 1

Answer:

We know that if two sides of a triangle are equal then their opposite angles are equal.

$\sf \: Let \: \angle { A} = \angle {C } = x$

We know that sum of all angles of triangle is 180°.

$\sf\therefore \angle{A} + \angle{B} + \angle{C} = 180 \degree \\ \sf \: x + 90 \degree + x = 180 \degree \\ \sf \: 2x = 180 \degree - 90 \degree \\ \sf \: 2x = 90 \degree \\ \sf x = \frac{\cancel{90} \degree}{ \cancel2} \\ \sf \: x = 45 \degree$

$\sf \: \angle { A} = \angle {C } = x = 45 \degree \\ \sf \boxed{ \angle { A}= 45 \degree}$