Most commonly associated with the shape of a "Stop" sign, the octagon has eight sides that are equal in length. The circumference of an octagon, also known as the perimeter, can be calculated by using a simple mathematical formula and a length measuring device such as a tape measure. Measu...
The easiest shape for which to calculate volume is a rectangular container, such as a fish tank or a show box. It has three sides of lengths a, b and c. You probably already know that you can calculate the area of a cross section of the box by multiplying its ...
So, our new formula for finding the measure of an angle in aregular polygonis consistent with the rules for angles of triangles that we have known from past lessons. Example 2 To find the measure of an interior angle of a regular octagon, which has 8 sides, apply the formula above as ...
A polygon is a closed plane figure bounded by straight sides. Polygons include many common figures (triangles, rectangles, etc.). They also can be used for approximation of more complex shapes. Below is an irregular octagon: Fig. 1. Polygon area. For polygons the total area is calculated ...
The angles in an octagon (an 8-sided polygon) total 1080 degrees. 3 Divide the total measure of all of a regular polygon's angles by the number of its angles. A regular polygon is a polygon whose sides are all the same length and whose angles all have the same measure. For instance...