Question

find the radius of the circles with the following areas
a. 102cm²
b. 3.14cm²
c. 50.3cm²
d. 452.16cm²​

Answer 1

Step-by-step explanation:

a.

$a. \: \: \pi {r}^{2} = 102 \\ = > {r}^{2} = \frac{102}{\pi} \\ \\ = > {r}^{2} = \frac{7 \times 102}{22} \\ {r}^{2} = \frac{714}{22} \\ \\ = > {r}^{2} = \frac{357}{11} \\ \\ {r}^{2} = 32.46 \\ \\ = > r = 5.697cm \\ \\ answer \: isi \: tarh \: sbhi$