What is the perimeter of a square with an area of 25 yd2 ( got 20 yd) @Opcode other answers: 5 yd, 100yd

Question

What is the perimeter of a square with an area of 25 yd2   ( got 20 yd)   @Opcode    other answers:  5 yd,   100yd

opcode · Answer

Are you sure the question do not have a typo? 
From the answer choice I cannot see how you could get 25 yd. :-/

anonymous · Answer

i meant 20 yd ;o

opcode · Answer

The perimeter of a square formula is: $$P = 4(a)$$
a = one side.

What I meant is non of them equal to an area of 25 yd.

anonymous · Answer

I see ;o

anonymous · Answer

maybe I did it wrong  im seeing p=20 yd in this problem

opcode · Answer

If the question says the perimeter is 20 then: $$P=4(5)$$
aka 5yd would work.

anonymous · Answer

ahh (sorry had to refresh to get back here  3 left to answer next is ) What is the area of a square with a perimeter of 60 mm , but wasn't sure about this one

anonymous · Answer

I know the perimeter is 60.0 mm, unless this calculator on here is telling me diffrent

opcode · Answer

Area of a square:
$$A = a^2$$

From the perimeter being 60mm we know that one side is 15mm.

Now apply the formula above:
$$A = 15^2$$
$$A = 225$$

anonymous · Answer

ah so it is 225 mm2 ;D