Question

tolong dibantu ya kakak soalnya besok di kumpulkan jangan jawab asal yaaa​

Answer 1

Verified answer

a. L = luas trapesium - luas setengah lingkaran

= 1/2 × (ab + cd) × t - 1/2 × π × r²

= (1/2 × (28+36) × 14) - (1/2 × 22/7 × 14²)

= (1/2 × 64 × 14) - (1/2 × 22/7 × 196)

= (1 × 64 × 7) - (1 × 11 × 28)

= 448 - 308

= 140 cm²

b. L = luas persegi - luas lingkaran

= s × s - 1/4 × π × d²

= (35 × 35) - (1/4 × 22/7 × 35²)

= 1225 - (1/4 × 22/7 × 1225)

= 1225 - (1/2 × 11 × 175)

= 1225 - 962,5

= 262,5 cm²

c. L = luas persegi - luas lingkaran

= s × s - 1/4 × π × d²

= (14 × 14) - (1/4 × 22/7 × 14²)

= 196 - (1/4 × 22/7 × 196)

= 196 - ( 1/2 × 11 × 28)

= 196 - 154

= 42cm²

d. L = luas persegi - luas setengah lingkaran

= s × s - 1/2 × π × r²

= (40×40) - (1/2 × 22/7 × 14²)

= 1600 - (1/2 × 22/7 × 196)

= 1600 - ( 1 × 11 × 28)

= 1600 - 308

= 1292cm²

SEMOGA BERMANFAAT ✨

note: jika ada yang salah tolong di koreksi