Question

The angles opposite the congruent sides of an isosceles triangle are congruent. Find the value of x I. The triangle show all your work. The triangle is in the image

Answer 1

The adjacent angles of similar sides are equal

`\\ \tt\longmapsto x+2(70)=180`

`\\ \tt\longmapsto x+140=180`

`\\ \tt\longmapsto x=40`

Done

Answer 2

• 40°

Explanation:

The triangle has two internal angles of 70° and one angle of x°.

Considering the sum of angles is 180°, find the value of x:

• x + 2*70 = 180
• x + 140 = 180
• x = 40