Question

Paai cara jangan ngaco dan jangan asal

Answer 1

Yg mana dan nomer brp?

Answer 2

no 2
L = L kotak + L. lingkaran
= 14 x 25 + 22/7 x 7 x 7
= 350 + 22 x 7
= 350 + 154
= 504 cm²

no 3
p tali = 5/2 x K. lingkaran
= 5/2 x 22/7 x 21
= 5/2 x 22 x 3
= 5/2 x 66
= 165 cm

no 4
L. arsir = L. persegi - 4 x L. lingkaran
= 40 x 40 - 4 x 3,14 x 10 x 10
= 1600 - 4 x 314
= 1600 - 1256
= 344 cm²

no 5
K = 2 x K lingkaran
= 2 x 3,14 x 10
= 2 x 31,4
= 62,8 cm

no 6
L arsir = L. kotak - L lingkaran
= 30 x 14 - 22/7 x 7 x 7
= 420 - 154
= 266 cm²

no 7
L. arsir = L. kotak + L. 1/2 lingkaran - L. 1.2 lingkaran
= L kotak
= 42 x 20
= 840 cm²

no 8
28² = s² + s²
784 = 2s²
s² = 784/2
s² = 392
s = √392
s = √49 x √8
s = 7 x √8
s = 7 x √4 x √2
s = 7 x 2 x √2
s = 14√2

L arsir = L. lingkaran - L persegi
= 22/7 x 14 x 14 - 14√2 x 14√2
= 22 x 2 x 14 - 14 x 14 x √2 x √2
= 44 x 14 - 196 x 2
= 616 - 392
= 224 cm²

no 13

no 14
L = L. lingkaran kecil + L. besar
= 22/7 x 7 x 7 + 22/7 x 14 x 14
= 22 x 7 + 22 x 2 x 14
= 154 + 44 x 14
= 154 + 616
= 770 cm²

no 15
L = 2 L Δ + L kotak
= 2 x 1/2 x 16 x 4 + 12 x 10
= 16 x 4 + 120
= 64 + 120
= 184 cm²