Luas daerah yang diasir adalah
Jawaban Terkonfirmasi
luas travesium ABCF
AB = 22 cm
CF = 10 cm
jika tinggi travesium = t maka
t² = (BC)² – (1/2 × (AB – CF))²
t² = 10² – (1/2 × (22 – 10))²
t² = 100 – (1/2 × 12)²
t² = 100 – 6²
t² = 100 – 36
t² = 64
t = √64
t = 8 cm
luas travesium
L1 = 1/2 × (AB + CF) × t
L1 = 1/2 × (22 + 10) × 8
L1 = 4 × 32
L1 = 128 cm²
luas persegi
L2 = CD × DE
L2 = 10 × 10
L2 = 100 cm²
luas area yg di arsir
L = L1 + L2
L = 128 + 100
L = 228 cm²
jawaban nya : D. 228 cm²