Perimeter: Finding the Perimeter When Sides Are Measured in Different Units
This clip explains that, when the sides of a polygon are stated in different units, it's necessary to convert so that they are expressed in the same units. Once this is done, the sides can be added up and the perimeter determined. The clip includes ...
Perimeter: Perimeter, Equilateral Polygons and Rectangles
This clip explains that we can measure the perimeter of an equilateral polygon by multiplying the length of one side by the number of sides in the polygon. The clip also notes that the formula for measuring the perimeter of a rectangle is "perimeter...
Perimeter: Perimeter and Irregular Polygons
This clip explains that, "
we can find the perimeter of any polygon by adding the lengths of all sides." The clip includes practical problems and examples which demonstrate how this is done.
Perimeter: Finding the Length of a Semi-Circle
This clip uses practical problems to explain how to find the length of a semi-circle. "The length of the semi-circle is half the length of the circumference," the clip states. "That means, once we know the circumference of a circle, we can find the ...
Perimeter: Summary: Perimeter
This clip summarizes how to find the perimeter of several kinds of polygons. It explains the difference between irregular and equilateral polygons, and also explores the parts of a circle and how, in conjunction with pi, they can be used to find the...
Perimeter: Introduction to Perimeter
This clip introduces the term "perimeter," which it explains "...refers to the distance around a polygon." The clip references some of the more common polygons, including triangles, pentagons, hexagons and octagons. The clip also distinguishes betwe...
Perimeter: Circles: Circumference, Radius and Diameter
This clip explores the perimeter of circles. "The distance around a circle is called its circumference," the clip explains. "One way to find the circumference of a circle is to know its diameter." The clip then talks about the use of pi ("
the valu...
Perimeter: Finding Unknown Side of a Rectangle When Perimeter and One Side Are Known
This clip uses practical problems and simple equations to explain how the perimeter formula for rectangles can be used to find the length of an unknown side, when the perimeter and length of one side are known.