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The total perimeter can be found by adding the two known sides together - then multiplying by 2 !
The perimeter of anything is found by adding all of the sides. So in the case of a pentagon it is the sum of the length of its five sides.
The equation for the perimeter of a shape depends on the shape itself. For a rectangle, the perimeter can be calculated using the formula: P = 2(l + w), where l is the length and w is the width. For a circle, the perimeter is called the circumference and can be found using the formula: C = 2πr, where r is the radius. For other shapes, such as triangles or irregular polygons, the perimeter is found by adding the lengths of all the sides.
Perimeter is the distance around the outside. Area is the space inside. By multiplying length times width The area is found. Perimeter is the sum of sides The distance all around.
Solid objects do not have a perimeter in the geometric sense.