1. r = 14 cm

Jawaban:

1. 88

2.132

3.176

4.220

5.264

Jawab:

1.       2 ×  π × r

= 2 × 22/7 × 14

= 2 × 22 × 2

= 88 cm²

2.            2 ×  π × r

= 2 × 22/7 × 21

= 2 × 22 × 3

=66cm²

3.     2 × π × r

     2 × 22/7 × 28

  2 × 22 × 4

176cm²

4.                    2 × π × r

          2 × 22/7 × 35

           2 × 22 × 5

        220cm²

5.           2 × π × r

        2 × 22/7 × 42

          2 × 22 × 6

      264cm²

Penjelasan dengan langkah-langkah: