Question

find the measure of each of the two equal angles of an isosceles right Triangle​

Answer 1

the angles are 45 degree each...
$90 + 2x = 180 \\ 2x = 180 - 90 \\ x = 90 \div 2 \\ x = 45$

Answer 2

by theorem of 45 45 90 theorem

2x +90=180

2x=90

x=45