Question

what is the diameter of the circle? 4.2 m a 2.1 m b 8.4 m c 8.2 m d 2.4 m

Explanation:

Step1: Recall diameter - radius relation

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

Step2: Identify the radius value

The radius $r$ of the given circle is $4.2$ m.

Step3: Calculate the diameter

Substitute $r = 4.2$ m into the formula $d = 2r$, so $d=2\times4.2$ m$ = 8.4$ m.

Answer:

B. 8.4 m