Question

Determine the radius of the penny

Answer 1

Answer:

9.5 mm

Step-by-step explanation:

The black line on the right of the penny represents the diameter: the measure from edge to edge of a circle.

We want to find the radius, the measure from the center to the edge of the circle. The radius is half of the diameter.

r=d/2

We know that the diameter is 19 millimetres. Substitute 19 in for d.

r=19/2

Divide

r=9.5

The radius is 9.5 millimetres

Answer 2

Answer:

Your answer would be B 9.5 mm

Step-by-step explanation:

The diameter is the full length of a circle and the radius is half. The diameter is 19 mm and 9.5 is half of 19 so 9.5 mm is the radius. I hope this helps.  :   )