Jawaban:
a. sudut ADC = 90°
2y+7y =90
9y = 90
y = 10
b.besar sudut ADB
2y = 2×10 = 30°
c.besar sudur BDC
7y = 7×10 = 70°
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Jawaban:
a. sudut ADC = 90°
2y+7y =90
9y = 90
y = 10
b.besar sudut ADB
2y = 2×10 = 30°
c.besar sudur BDC
7y = 7×10 = 70°