how to figure out the perimeter of a half circle?
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And the perimeter of a semicircle is half of its corresponding circle's perimeter plus its diameter: P = pi * r + d.
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To find the perimeter of a regular hendecagon you must first know the number of sides in a hendecagon is 11. When you know the number of sides of a regular polygon to find the perimeter you must multiply the side length by the number of sides. In this case it is .
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['Plot the coordinates.', 'Connect the dots and identify the figure. This is a 5-sided polygon.', 'Determine lengths. It will help to label each of the five lengths: ... ', 'If a formula exists, use it to find the perimeter. Recall that the perimeter (P) is the sum of the lengths of each side.']
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The radius is half the diameter, so use the formula r = D/2. This is identical to the method used for calculating the radius of a circle from its diameter. If you have a sphere with a diameter of 16 cm, find the radius by dividing 16/2 to get 8 cm. If the diameter is 42, then the radius is 21.
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The area of a semicircle is half of the circle. As the area of a circle is πr2. So, the area of a semicircle is 1/2(πr2 ), where r is the radius. The value of π is 3.14 or 22/7.
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Calculating the perimeter of a rhombus or diamond is simple because of its equal-length sides. Find the length of one of the diamond's sides. For this example, the length is 45. Multiply the length by 4 to calculate the diamond's perimeter.
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Learn that the perimeter of a circle has its own special name, called "circumference." The symbol is a capital C. It is calculated using the formula Pi x diameter, or 3.14 x d = C. It can also be calculated by Pi x (2 x radius) = C or 3.14 x (2 x r) = C.
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To find the area of a quarter circle, find the area of the whole circle by using the formula A = pi * r^2 and then divide by 4. To find the perimeter of the quarter circle, find the circumference of the whole circle, divide by 4, and then add the radius twice.
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To find the perimeter of a regular hexagon you must first know the number of sides in a hexagon which is 6. When you know the number of sides of a regular polygon to find the perimeter you must multiply the side length by the number of sides. The answer for the perimeter is .
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The perimeter of a circle is known as the circumference. To calculate the circumference of a circle you can use one of two formulae, either: C = 2πr or C = πd. In these formulae r is the radius and d is the diameter. C = π X d (3.14159 x 10) = 31.42 (to 4 s. f.)
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Perimeter of a Circle In these formulae r is the radius and d is the diameter. C = π X d (3.14159 x 10) = 31.42 (to 4 s. f.) To calculate the perimeter of an arc (part of a circle) from the angle you can calculate the fraction of the circle.
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Approximating as a Circle For example, if the water fills up half of the circular cross-section, this is π radians, giving a wetted perimeter of π_r_ = π_d_ / 2, where d is the diameter of the pipe.
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To calculate the perimeter of a shape, we add the lengths of each side. To find the perimeter of this irregular triangle, we add up the three side lengths. A tip for teaching perimeter of irregular shapes is to cross off each side length as you have added it.
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To find the perimeter of a rectangle, add the lengths of the rectangle's four sides. If you have only the width and the height, then you can easily find all four sides (two sides are each equal to the height and the other two sides are equal to the width). Multiply both the height and width by two and add the results.
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We may be asked to find the perimeter of a compound shape like the one above. To find the perimeter, we simply add up the lengths of each outside edge. It may be helpful to look out for number bonds when adding the sides. For example, 7 + 3 = 10.
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['Perimeter = 12 x s.', 'Length of one side: 17 mm.', 'Perimeter: 12 x 17 mm = 204 mm.']
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To do this, you will need to find the area of the rectangle, then find the area of the half circle, and add them together. To find the area of the rectangle, you need to know the length and width and multiply them. The area of a semi-circle is 1/2 πr2.