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If the semicircle is placed on 1 side of the rectangle:
- Find the total perimeter(circumference) of the side opposite to the one with the semicircle's base and the 2 sides perpendicular to the semicircle's base.
- The formula for circumference of a circle is 2πr.Thus for the semicircle we will take the circumference as πr.
- Find the sum of 1st and 2nd points. This is the final answer.
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How do you find the circumference of a semicicle?
circumference of a semicircle = pi * diameter / 2 (pi multiplied by the diameter and divided by 2)
How to find the length of the curved part of the semicircle?
A circle is two semicircles put together. The circumference of a circle is the length around it, so half of that would be what you are aiming for. Let's call the circumference "c" and the radius (the straight part of the semicircle) "r". Pi is also needed in this problem, so we can use "π". The equation for the circumference of a circle is c=2πr. Replace "r" with the length of the straight part of the circle, and do the math. Divide your answer by 2.Example:r=2c=2πrc=2π2c=4πc=(approximately)12.5712.57 divided by 2 equals approximately 6.29.The length of the curved part of the semicircle is 6.29!Hope this helps!
How do you find the diameter of a semicircle when radius is given?
The diameter of the semicircle will be twice the radius.
How do you find the perimeter of a shape that has a semicircle?
To find the perimeter of the curved section of the semi-circle: Perimeter of semicircle = Pi x radius If you also need to the find the perimeter of the straight part of the semicircle (the diameter), it is simply double the radius.
How do you find the area of a semi-circle if you know the diameter?
A semicircle is 1/2 of a circle. Find the area with the diameter you are given as if you had a whole circle, then divide that answer by 2 to get the area of the semicircle.
