pakai jalan no. 26.

luas persegi = S² = 7² = 49 cm²
luas trapesium = (a+b)/2×t
= (7+12)/2×(15-7)
= 19/2×8
= 19×4
= 76 cm²

Luas gabungan
49+76 = 125 cm²

L persegi
sisi × sisi
7 × 7 = 49 cm2

L trapesium
1/2 × ( a+b ) × t
1/2 × ( 12+7 ) × 8
19 × 4
= 76 cm2

Luas gabungan = 49 + 76
= 125 cm2


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