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= 15 x 10
= 150
keliling = 2(p + l)
=2 (15 +10)
=2 x 25
=50
= 15 × 10
= 150 cm²
Keliling = 2 ( p + l)
= 2 (15 + 10)
= 2 × 25
= 50 cm
2. Luas = 81 cm²
s² = 81
s = √81
s = 9 cm
Keliling = 4s
= 4 × 9
= 36 cm