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# find the perimeter of a semi circle

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Question:r^4 Is it that formula? The radius is 4 3.14x 4= 12.56 what do i do with that ^4? 1st question is that the right formula?

Answers:Taking this question and breaking it down - The formula - Perimeter of a full circle is 2 * pi * r or pi * diameter for a semi-circle or half of a circle you need to also add a diameter for the line that connects the open circle .... so, In the form that you can use r in the calculation : (( 2 r ) / 2 ) + 2 r or r + 2 r or r ( +2) For your answer r = 4 4 ( 3.14 + 2) = 20.56 inches I hope this helps. Keep pluggin

Question:

Answers:C = 2pi*r then C/2 = pi*r

Question:Hi, I am in Maths and my teacher has asked me to find the perimeter of a semi-circle. I need the formula so please help! (No stupid answers please :l)

Answers:The circumference of a circle is given by the formula: C = 2 r where r is the radius of the circle. A semi-circle would be one-half of the full circumference ! We usually call the distance around a circle the circumference rather than the perimeter. QED

Question:I've got to try and finish this calculus homework but I can't remember the formula.

Answers:Volume of a hemi-sphee is 2*pi*r^3/3 If it is thesurface area of a solid hemisphere that you want to know,it is 3*pi*r^2 Perimeter of a semi-circle is pi*r+2r