3 ya r=30dengan cara

By Admin ReiPosted on December 3, 2022

3 ya r=30dengan cara

3 ya r=30dengan cara

No. 1

L = π × r²
L = 3,14 × (20 ÷ 2)²
L = 3,14 × 10²
L = 3,14 × (10 × 10)
L = 3,14 × 100
L = 314 cm²

No. 2

L = π × r²
L = 22/7 × 21²
L = 22/7 × (21 × 21)
L = 22/7 × 441
L = 22 × (441 ÷ 7)
L = 22 × 63
L = 1.386 cm²

No. 3

L = π × r²
L = 3,14 × 30²
L = 3,14 × (30 × 30)
L = 3,14 × 900
L = 314 × 9
L = 2.826 cm²

No. 4

L = π × r²
L = 22/7 × (56 ÷ 2)²
L = 22/7 × 28²
L = 22/7 × (28 × 28)
L = 22/7 × 784
L = 22 × (784 ÷ 7)
L = 22 × 112
L = 2.464 cm²

No. 5

L = π × r²
L = 3,14 × (60 ÷ 2)²
L = 3,14 × 30²
L = 3,14 × (30 × 30)
L = 3,14 × 900
L = 314 × 9
L = 2.826 cm²

■□■□■□■□■□■□■□■□■□■□■□■□■□

$boxed{ sf{A: n: s : w : e : r : : by : : }{ boxed{ green{ sf{ DGFC }}}}}$

Jawaban:

1.

L = π × r²

L = 3,14 × (20 : 2)²

L = 3,14 × 100

L = 314 cm²

2.

L = 22/7 × 21²

L = 22/7 × 441

L = 22 × (441 ÷ 7)

L = 22 × 63

L = 1.386 cm²

3.

L = π × r²

L = 3,14 × 30²

L = 3,14 × 9

L = 2.826 cm²

4.

L = 22/7 × (56 ÷ 2)

L = 22/7 × 28²

L = 22/7 × 784

L = 22 × 112

L = 2.464 cm²

5.

L = 3,14 × (60 ÷ 2)

L = 3,14 × 30²

L = 3,14 × 900

L = 3,14 × 9

L = 2.826 cm²