?

Geometry

Free Version

Upgrade subject to access all content

Easy

Isosceles Triangle: Finding the Vertex Angle

GEOM-KET9RL

The base angles of an isosceles triangle are ${(10x+2)}^{\circ}$ and ${(-8x+38)}^{\circ}$.

Find the vertex angle.

A

$20$

B

$22$

C

$44$

D

$136$

E

$158$