diketahui panjang PQ=41 mm, PA=16 mm dan QD=7 mm hitunglah panjang CD!

Diketahui

PQ = 41 mm
PA = 16 mm
QD = 7 mm

Ditanya

CD =.... (PGSPL)

Jawaban
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CD² = PQ² - (PA - QD) ²

CD² = 41² - (16 - 7)²

CD² = 1681 - 9²

CD² = 1681 - 81

CD² = 1600

CD = √1600

CD = 40 mm