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First find the circumference of the whole circle using Pi x diameter. Halve the answer and add the diameter.
Thus: 3.1416 × 10 = 31.416 ÷ 2 + 10 = 25.708cm
So the perimeter of the semi-circle is 25.7cm
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∙ 10y ago
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What is the diameter of a circle with a 10cm circumference?
diammeter*pi= 10 divide both side by pi to find the diameter: diameter = 3.183098862 or 3 cm to the nearest cm.
A circular mat has a diameter of 20cm find its radius hence calculate the area of the mat use the value 3.14 for pie?
3.14*102 = 314 square centimeters
How do you find the area of a semi-circle radius 10cm?
πr² is the formula for finding the area of a circle. To find the area of a semicircle just divide the answer by two. So take the radius, square it, which in this case would be 100, multiply it by π [pi (3.14)] and divide it by two.
What is the area of the semi circle 30 feet?
Is the 30ft the radius or the diameter. The area of a circle = Pi x (radius squared), so, if the diameter is 30ft, making the radius 15ft, the area would be Pi x(15 squared) square feet, and the area of its semicircle would be half of that, so the area required = Pi x (15 squared) divided by 2 = 353.429 sq ft On the other hand, if the diameter is 15ft, making the radius 7.5ft then the area required = Pi x (7.5 squared) sq ft for the full circle and half as much for the semicircle = 88.3573 sq ft As an extra; you will find that the area of the smaller semicircle is exactly one quarter of that of the larger semicircle, and I wonder if you can reason out why that is so.
What is the formula to find the area of a semicircle?
Pi*radius squared is how to find the area of a semicircle
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 we find a perimeter of a semicircle?
It is its diameter plus half of its circumference
If diameter is 7 find perimeter of semi circle?
Pi times the diameter gives you the circumference. Then divide that answer by two. Then add in the diameter - and, voila, you have your answer as to the perimeter of a semicircle.
How do you find the perimeter of a semicircle if its diameter is 45 cm?
Perimeter of the semicircle including its base: 180/360*pi*45+45 = 115.686 cm rounded to 3 decimal places
How do you find the perimeter of a semicircle?
The circumference of a semicircle is pi times the radius plus the diameter.
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 figure the perimeter of a semicircle if the the straight side is 36?
Consider the straight side as the diameter of a circle, find the circumference of the circle, calculate half the circumference and then add it to the diameter. circumference = pi x diameter = 3.14 x 36 = 113.04 perimeter of semicircle = 1/2 circumference + 36 = 56.52 + 36 = 92.52
What is the perimeter of 10cm?
10cm is a length. You can only find perimeter (length all the way round) if there is a shape!
How do you find the radius of a semicircle?
it is have the diameter
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.
Find 4 rectangles with same area with different perimeter?
10cm by 10cm (perimeter=40cm), 5cm by 20cm (perimeter=50cm), 50cm by 2cm (perimeter=104cm), 100cm by 1cm (perimeter=202cm). All of these rectangles' areas are 100cm2
How do you find the perimeter from the diameter?
The perimeter or circumference of a circle = diameter times pi
