Question

calculate the area of the circle. formula: ( a=pi r^{2} ) use 3.14 for pi. ( a=? mathrm{cm}^{2} ) round to the nearest tenth.

Explanation:

Step1: Find the radius

The diameter of the circle is 6 cm, and the radius \( r \) is half of the diameter. So \( r=\frac{6}{2}=3 \) cm.

Step2: Calculate the area

Using the formula \( A = \pi r^{2} \), substitute \( \pi = 3.14 \) and \( r = 3 \). So \( A=3.14\times3^{2}=3.14\times9 = 28.26 \) cm².

Step3: Round to the nearest tenth

28.26 rounded to the nearest tenth is 28.3.

Answer:

28.3