Question

1. find the circumference of both circles to the nearest hundredth.

the circumference of the blue circle is about ______ m.
the circumference of the green circle is about ______ m.
81.64
150.72

Explanation:

Step1: Identify radii of circles

The blue circle has radius $r = 12\ \text{m}$. The green circle has radius $R = 2\times12 = 24\ \text{m}$.

Step2: Calculate blue circle circumference

Use formula $C=2\pi r$.
$C_{\text{blue}} = 2\pi(12) = 24\pi \approx 75.40\ \text{m}$

Step3: Calculate green circle circumference

Use formula $C=2\pi R$.
$C_{\text{green}} = 2\pi(24) = 48\pi \approx 150.80\ \text{m}$

Answer:

The circumference of the blue circle is $\boldsymbol{75.40}$ m.
The circumference of the green circle is $\boldsymbol{150.80}$ m.