Question

A) ABC is an isosceles triangle . When A=130 degree, there is only one possible value for angle B. Explain why

b) when A=56 degree.There are three possible sizes of angle B. What are they ?

Answer 1

The statement which must be true for an isoscelles triangle ABC has a 130° angle at vertex B is; m∠A + m∠C = 50°.

Explanation: