Jawabanmu

Jawaban paling cerdas!
2014-05-25T11:22:14+07:00
A. x = 13^2 -5^2
= 169 - 25
= akar 144 = 12

PR = 2x = 12 × 2 = 24 cm

b. L = 1/2 × d1 × d2
= 1/2 x QS × PR
= 1/2 × 10 × 24
= 5 × 24
= 120 cm2

c. PT = 1/2 PR
= 1/2 × 24
= 12 cm

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