Question

The diameter of a semicircle is 2 miles. What is the semicircle's radius?

Answer 1

Answer:

1 mile

Step-by-step explanation:

The diameter is twice the radius, or

d = 2r

We know the diameter is 2, so we can substitute that in for d

2 =2r

We want to find r, so we need to solve for it. To do that, we need to get r by itself. r is being multiplied by 2. To undo this, divide both sides by 2, since division is the opposite of multiplication

2 / 2 = 2r / 2

The 2s on the right will cancel, and we are left with

1 = r

So, the radius is 1 mile

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