Question

I need to know the number I think it’s nine but yk I need some clarification

Answer 1

The edges MN and ON are congruent, so the triangle is isosceles. In particular, this means angles M and O are congruent. Angle N is right, so it has measure 90º. The interior angles to any triangle sum to 180º, so

2 • 5xº + 90º = 180º

10xº = 90º

x = 9

Answer 2

I think the anwser to your qustion is nine too