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= d1 x d2 x 1/2
= 6 x 8 x 1/2
= 24 cm²
sisi:
= √ 3² + 4²
= √ 9 + 16
= √ 25
= 5 cm
= 1/2 × 6 cm× 8 cm
= 24 cm²
s= √(6/2)² +(8/2)²
= √3²+4²
=√9+16
= √25
= 5
K= 5×4
= 20cm