sisi di atas trapesium= √(24²-(28-21)²)= √(576-49)= √(527)= 23 cm
luas permukaan= luas alas & tutup + luas sisi lain
= (1/2×2×(21+28)×24)+(21×35)+(24×35)+(28×35)+(23×35)
= 1.176+735+840+980+805
= 4.536 cm²
maaf kalo saya salah ya...
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sisi di atas trapesium= √(24²-(28-21)²)= √(576-49)= √(527)= 23 cm
luas permukaan= luas alas & tutup + luas sisi lain
= (1/2×2×(21+28)×24)+(21×35)+(24×35)+(28×35)+(23×35)
= 1.176+735+840+980+805
= 4.536 cm²
maaf kalo saya salah ya...