Question

find the missing measurements for each circle. you can use 3.14 as an approximation for pi. approximate circumference of the circle. you can use your zearn calculator to help you solve. you may consider writing the circumference to the hundredths place. radius (cm) diameter (cm) circumference (cm) 2.2

Explanation:

Step1: Recall the relationship between radius and diameter

The diameter $d$ of a circle is twice the radius $r$, i.e., $d = 2r$.

Step2: Calculate the diameter

Given $r=2.2$ cm, then $d = 2\times2.2= 4.4$ cm.

Step3: Recall the formula for the circumference of a circle

The formula for the circumference $C$ of a circle is $C=\pi d$ (or $C = 2\pi r$). Here we use $C=\pi d$.

Step4: Calculate the circumference

Substitute $d = 4.4$ cm and $\pi=3.14$ into the formula: $C=3.14\times4.4 = 13.816$ cm. Rounding to the hundredths place, $C\approx13.82$ cm.

Answer:

Diameter: 4.4 cm, Circumference: 13.82 cm