Jawaban untuk pertanyaannya no.7? Beserta penyelesaiannya
Rozadi
A. OB²=OA²-AB² =25²-24² =625 - 576 OB²=49 OB=√49 = 7 B. L segi3 = 1/2 x AB x OA = 1/2 x 24 x 7 = 84 cm² C. L layang2 = L segi3 x 2 = 84 x 2 = 168 cm² D. L layang2 = 1/2 OA x BC 168 = 1/2 7 x BC 168/2 = 7 x BC ⇔ BC = 84/7 ⇔ BC = 12
=25²-24²
=625 - 576
OB²=49
OB=√49 = 7
B. L segi3 = 1/2 x AB x OA
= 1/2 x 24 x 7
= 84 cm²
C. L layang2 = L segi3 x 2
= 84 x 2
= 168 cm²
D. L layang2 = 1/2 OA x BC
168 = 1/2 7 x BC
168/2 = 7 x BC
⇔ BC = 84/7
⇔ BC = 12
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