If ab = bc in traingle abc, then which of the following must be true?

1. m^a < m^c
2. m^a = m^c
3. m^a > m^c
4. m^a > m^b

m∠A = m∠C

Step-by-step explanation:

If AB = BC in triangle ABC, then Δ ABC is a isosceles triangle.

We know that there is a theorem which says that "Angles opposite to equal sides of a triangle are equal".

Thus if  AB = BC, then

m∠A = m∠C [Angles opposite to equal sides of a triangle are equal]

Thus, option 2 is right. If AB = BC in triangle ABC, then m∠A = m∠C must be true.

1696 hundred thousand

step-by-step explanation: