Question

One angle of an isosceles triangle measures 34°. Which other angles could be in that isosceles triangle?

112 or 55 or 73 or 34

Answer 1

73

Explanation:

Because the sum of all the angles in a triangle is 180°, we can subtract 34 from 180.

`180-34\\146\\`

In an isosceles triangle there are two congruent angles (base angles theorem), so we can divide 146 by 2.

`146/2\\73`