Question

Triangle ABC is isosceles.

Answer 1

we know that

An isosceles triangle is a triangle with two equal sides and two equal angles

so

in this problem we have

AC=AB

∠B=∠C

therefore

the answer is

It is equal to the measure of angle C

Answer 2

Answer:  The correct option is (D) It is equal to the measure of angle C.

Step-by-step explanation:  Given that ΔABC is an isosceles triangle as shown in the figure. AB = AC.

We are to select the TRUE statement about the measure of ∠B.

We know that the measures of the angles opposite to the equal sides of a triangle are equal.

So, AB = AC implies that

m∠C = ∠B.

Therefore, the measure of angle B is equal to the measure of angle C.

Thus, (D) is the correct option.