In isosceles △abc, ab = bc and ch is an altitude. find the perimeter of △abc, if ch = 84 cm and m∠hbc = m∠bac +m∠bch?

I think I could help you

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Or we can prove some properities without calculating by details

Step-by-step explanation:

I think I could help you

Have fun and feel free to ask me something new.

Or we can prove some properities without calculating by details

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^

something over 10 so ? /10

step-by-step explanation: