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= 1/2 .(180-124)
=1/2 .(56)
= 28
b. jika pq= qr maka prq = qpr = 28
c. 180-(180-(62+28)
180-(180-90)
180-90
= 90
rqo = 180-(90+28)
=180-118
=62
betul gak ?