Question

Hitunglah Luas dan Keliling Lingkaran dari:

a.keliling: diameter 14 cm
b. Luas dan Keliling: 1. r = 8 cm
2. r = 28 cm
3. Diameter= 28 cm
4. r = 3.5 cm
5. diameter = 20 cm
6. diameter = 21 cm

Answer 1

A. K = 22/7 x d = 22/7x14 = 44 cm
b. L = 3,14 x r x r = 3,14 x 8 x 8 = 3,14 x 64 = 200.96 cm
2. L = 22/7 x r x r = 22/7 x 28 x 28 = 22/7 x 784  = 2464 cm
K = 22/7 x d = 22/7 x 56 = 176

3. L =  22/7 x r x r = 22/7 x 14 x 14 = 22/7 x 196  = 616 cm
K = 22/7 x d = 22/7 x 28 = 88

4. L = 22/7 x r x r = 22/7 x 3,5 x 3.5 = 22/7 x 12,25  = 38,5 cm
K = 22/7 x d = 22/7 x 3,5 + 3,5 = 22/7 x 7 = 22

5. L = 3,14 x r x r = 3,14 x 10 x 10 = 3,14 x 100  = 314 cm
K = 3,14 x d = 3,14 x 20  = 62,8

6. L = 22/7 x r x r = 22/7 x 10,5 x 10.5 = 22/7 x 110,25  = 346.5 cm
K = 22/7 x d = 22/7 x 21 = 66

sudaah