26) 5a + 140 = 180
5a = 180-140
5a = 40
a = 8
27) hitung pelurus R dulu
180-150 = 30
Jadi sudut PQR = 40+30 = 70
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26) 5a + 140 = 180
5a = 180-140
5a = 40
a = 8
27) hitung pelurus R dulu
180-150 = 30
Jadi sudut PQR = 40+30 = 70