Question

question 1 of 10
which is the best estimate of the circumference of this circle?
1.5
a. 3 units
b. 1.5 units
c. 9 units
d. 30 units

Explanation:

Step1: Recall circumference formula

The formula for the circumference of a circle is $C = 2\pi r$, where $r$ is the radius.

Step2: Identify radius value

The radius $r = 1.5$ units.

Step3: Calculate circumference

Substitute $r = 1.5$ into the formula: $C=2\pi(1.5)=3\pi$. Approximating $\pi\approx 3$, we get $C\approx3\times3 = 9$ units.

Answer:

C. 9 units