Question

One angle of an isosceles triangle is 100 degrees. Which other angles could be in that isosceles triangle? 40,30,20,70

Answer 1

40

Explanation:

The last two sides must be identical because it is an isosceles triangle and we already have 100 degrees.

Answer 2

An isosceles triangle has two identical angles and one different angle. In this case our different angle is 100. We know that there is 180 degrees in a triangle. So you subtract 180-100= 80. We still have 2 identical angles to find. So since they are identical you can evenly distribute the 80 by dividing it by 2. Which is 40. The answer is 40