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= √12²+5²
= 13 cm
Lp = La + L sisi tegak
= (10²) + 4 (1/2 × 10 × 13)
= 100 + 4 (65)
= 100 + 260
= 360 cm²
√12^2+5^2
√144+25
√169= 13.
luasnya ada di foto.