Answer:
the answer is option D. 1
Step-by-step explanation:
since the sides are given equal, the angles opposite to thise sides are also equal. it is an isosceles triangles. the angles other than 2, are 45°. therfore, using anglesum property of a triangle,
angle 2 = 180°- (45° + 45°)
= 180°- 90°
= 90°
given: angle 2 = 90°x
therefore, 90°= 90x
x = 90°/90°
= 1
