How do you find a perimeter
The perimeter is the distance around an object. To find the perimeter, add the length of the sides together.
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65.5 13.5
I'm sorry, but I am not sure what you are referring to with the numbers 65.5 and 13.5. Can you please provide more context or information on what you need help with?
To find the perimeter of a shape, you need to add together the lengths of all its sides. The method you use to find the perimeter depends on the type of shape you're dealing with.
For regular polygons (shapes with all sides and angles equal), you can multiply the length of one side by the number of sides. So, if you have a regular pentagon with sides of length 5 cm, the perimeter would be calculated as 5 cm × 5 sides = 25 cm.
For irregular polygons (shapes with sides of different lengths and angles), the best approach is to break the shape down into simpler forms (such as squares, rectangles, triangles) and find the perimeter of each individual component. Then, you sum up the perimeters of all the components to find the overall perimeter of the polygon.
For a rectangle, the formula for finding the perimeter is P = 2l + 2w, where P is the perimeter, l is the length, and w is the width. For example, if you have a rectangle with a length of 8 cm and a width of 5 cm, the perimeter would be (2 × 8 cm) + (2 × 5 cm) = 26 cm.
For a triangle, you just need to add up the lengths of all three sides. Let's say you have a triangle with side lengths of 4 cm, 5 cm, and 6 cm. The perimeter would be 4 cm + 5 cm + 6 cm = 15 cm.
For a circle, the perimeter is called the circumference, and it can be calculated using the formula C = 2πr, where C is the circumference and r is the radius of the circle. For example, if you have a circle with a radius of 3 cm, the circumference would be 2 × π × 3 cm = 6π cm (or approximately 18.85 cm).
It's important to remember that units should be consistent when calculating perimeters. Make sure all lengths are in the same units (e.g., cm, inches, meters) before performing the calculations.