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S = 126
360 - 126 - 126 = R + P
R + P = 108
R = P, maka :
P = 108 /2 = 54
atau :
sudut Q P S = 180 - 126 = 54 Derajat
catatan : yang ditanya bukan x Pada sudut Qrs
324+ 2x = 360
2x = 36
x = 18
QPS = X+ 36
= 18+ 36
= 54 (D)
8. L = a × t
8 ×15
= 120 m² (A)
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