An isosceles triangle has an angle that measures 70°. Which other angles could be in that isosceles triangle? Choose all that apply.

Answer 1

A triangle has 180^o and an isosceles triangle has two angles that are the same. As 70 is less than half, we have a couple of possible solutions to this.

The first one is that it's the off angle, and we need to find the equal pair angles:

180 - 70 = 110

110 / 2 = 55

So one possible solution is 70-55-55.

The other possible solution is that it's one of the pair of equal angles:

110 - 70 = 40 (remember we have 110 degrees left over from the equation above)

So the other possible solution is 70-70-40.