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How do you find the perimeter for a semi circle?
Its perimeter is half of its circumference plus its diameter
Is the circumference of a circle greater than less than or equal to the perimiter of a semi circle?
The circumference is pi x diameter Perimeter of semi circle is (0.5) x pi x diameter + diameter which is diameter x (0.5pi + 1) Subtracting Perimeter from Circumference we get [pi x diameter] - [diameter x (0.5pi + 1)] which is diameter x [pi - 0.5pi -1] pi = 3.1415 Hence the result = diameter x (3.1415 - 1.570 - 1) which will always be positive. Hence circumference is greater than perimeter of semi circle. Intuitively also we see that the diameter is a straight line and the semi circles are arcs over the end points of the diameter.
How do you do work out the circumference of a semi -circle?
multiply pi times diameter and divide by 2!
What is the circumference of a semi-circle with a diameter of 20?
Circumference = 2*pi*r r = diameter/2 20/2 = 10 ------------------so, 2*pi(10) = 63 ====
How many cm are there in a semi circle?
First the circle diameter must be given. for example, for a semi circle of diameter 8 centimeters:Step 1: the circumference of the full circle (= pi x Diam). result is: 25.12 cmStep 2: Divide the circumference in half. This is the length of just the curved part of the semi-circle. result: 12.56 cmStep 3: Add the diameter to the result of step 2.Step 4: The result is 12.56 + 8 = 20.56 cm. This is the perimeter of the semi-circle!Note point: There are 360 degrees in a circle, so a quarter of a circle has 90 degrees no matter what size the circle is. Half a circle has 180 degrees.
