Best Answer

16ft..

A perimeter is the distance around a shape. So if this is a 3 by 5ft rectangle , considering it has four sides, you add them all up so:

3+3+5+5= 16

so the perimeter is 16ft

Q: How do you find the perimeter of 3ft by 5 ft?

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Volume = 2*3*5 = 30 cubic feet

1:5

It's got 5 sides, so multiply 6 cm by 5...

ok, i figured it out. the length of the triangle is 5, 4, 3. the four is 1/2 the length of one side of the rectangle. so the rectangle sides are 8, 8, 3, 3 (one three being one side of the rectangle as well)

If it's a 12 by 5 rectangle then the perimeter is: 12+5+12+5 = 34 cm

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