What is the expression of the perimeter of a semicircle whose radius is 2?

Answer 1
I am not sure that it is what you want but here it is: If the entire circle has perimeter equal to #2pir# a semicircle will have: #(2pir)/2=pir# perimeter. If the radius is #2# the perimeter will then be: #2pi#.
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Answer 2

The expression for the perimeter (P) of a semicircle with a radius (r) is P = πr + 2r. For a radius of 2, the perimeter is P = 2π + 4.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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