Question

PLEASE HELP ASAP PLEASE THANK YOU

Answer 1

Answer:

what grade is this

Step-by-step explanation:

Answer 2

m∠A + m∠B = m∠B + m∠C  

Example: Δ ABC is isosceles at B

⇒ m∠A = m∠C

⇔ m∠A + m∠B = m∠B + m∠C  

So:  m∠A + m∠B = m∠B + m∠C ⇒ m∠A = m∠C

P/s: sorry, my writing skill is not very good, but u can use the above ideas to write

Ok done. Thank to me :>