Hitunglah luas dan keliling lingkaran yang mempunyai; 1. r = 8 2. r = 11 3. r = 9 4. D = 24 5. D =

1. K = 2πr = 2 × 3.14 × 8 = 50.24

L = πr² = 3.14 × 8 × 8 = 200.96

2. K = 2πr = 2 × 3.14 × 11 = 69.08

L = πr² = 3.14 × 11 × 11 = 379.94

3. K = 2πr = 2 × 3.14 × 9 = 56.52

L = πr² = 3.14 × 9 × 9 = 254.34

4. K = πd = 3.14 × 24 = 75.36

L = πr² = 3.14 × 24 × 24 = 301.44

5. K = πd = 22/7 × 28 = 88

L = πr² = 22/7 × 28 × 28 = 2464