Two angles of a triangle each measure 70°. What is the measure of the third angle in degrees?

1 Answer | Add Yours

giorgiana1976's profile pic

giorgiana1976 | College Teacher | (Level 3) Valedictorian

Posted on

We'll begin by recalling the fact that the sum of the angles of triangle is of 180 degrees.

Since the two angles of triangle measure each 70 degrees, then we'll get:

70 + 70 + x = 180

140 + x = 180

x = 180 - 140

x = 40 degrees

The third angle of the isosceles triangle is x = 40 degrees.

We’ve answered 315,586 questions. We can answer yours, too.

Ask a question