Find the area of the circle with the given radius or diameter. Use "3. 14" for n. Round your answer

Question

to the nearest tenth
Diameter = 42.0 mm
• 137.6mm^2
• 376.7 mm^2
• 1,384.7 mm^2
• 6,027.0 mm^2

Answer 1

The formula for the area of a circle is A = πr^2, where r is the radius.

Given the diameter is 42.0 mm, we can find the radius by dividing the diameter by 2:
r = 42.0 mm / 2 = 21.0 mm

Now we can plug this radius into the formula:
A = 3.14 * (21.0)^2
A = 3.14 * 441.0
A = 1,384.7 mm^2

Therefore, the area of the circle with diameter 42.0 mm is approximately 1,384.7 mm^2.

The answer is:
• 1,384.7 mm^2