perimeter
The perimeter of a shape is the total distance around its outer boundary
The perimeter of a shape is the total distance around its outer boundary. It can be thought of as the length of the outline of the shape.
To find the perimeter of a rectangle or square, you add up all the lengths of its sides. For example, if a rectangle has sides measuring 5 units and 8 units, its perimeter would be 5 + 5 + 8 + 8 = 26 units.
For triangles, you sum up the lengths of all three sides. If a triangle has sides measuring 3 units, 4 units, and 5 units, its perimeter would be 3 + 4 + 5 = 12 units.
The perimeter of a circle is called its circumference. It is calculated using the formula C = 2πr, where C represents the circumference and r represents the radius (distance from the center of the circle to any point on its edge). If a circle has a radius of 5 units, its circumference would be 2π(5) = 10π units.
In summary, the perimeter is the total distance around the outer boundary of a shape, and it is calculated differently depending on the type of shape.
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