1. s = 1/2 × (p+q+r)
= 1/2 × 17+10+21
= 1/2 × 48
= 24
r = axbxc/4×l
= 17×10×21/4×√s×(s-p)×(s-q)×(s-r)
= 3.570 /4×√24×(24-17)×(24-10)×(24-21)
= 3.570 / 4×√24×7×14×3
= 3.570 /4×√7.056
= 3570 / 4x84
= 3570 / 336
= 10,6
maaf kalau salah
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1. s = 1/2 × (p+q+r)
= 1/2 × 17+10+21
= 1/2 × 48
= 24
r = axbxc/4×l
= 17×10×21/4×√s×(s-p)×(s-q)×(s-r)
= 3.570 /4×√24×(24-17)×(24-10)×(24-21)
= 3.570 / 4×√24×7×14×3
= 3.570 /4×√7.056
= 3570 / 4x84
= 3570 / 336
= 10,6
maaf kalau salah