Question

please prove this...​

Answer 1

(ii)angle DBC is right angle because it is 90°

Answer 2

Answer:

I've proved the first I can't prove the second on this time. Maybe later.

Step-by-step explanation:

The proof is on the picture.

I can give you a hint about the second one

You have to prove that angle MBC =angle MCB

Then you have to prove that angle DBM = angle ACM. proving these at last you can prove that

<ACM + <MCB = <DBM + <MBC

Or, <ACB = <DBC

Therefore <DBC is right angle (as <ACB is right angle for <C is right angled.)

If you find my answer any helpful then please do rank me as the brainiest.