Jorgeluna23idn
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Johngood7777idn

1, => to find m<BAC=1/2 of measure arc Bc

=>m<BAC=72°÷2

=>m<BAC=36°

2, •to find measure arc AB

first we have Arc AD =142° so the center of the circle is equal with it.

• and we have measure arc BC =72°the circle is equal with it.

so let say that the center is [o] then <AoB=measure arc BC that means it measures 72° so arc AB is 72°

I hope it helps and if I am wrong please send messages

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