This is a picture of a donut I took at gymnastics. Donuts are mostly used by little class kids. The kids sit inside them and get rolled for fun. This piece of equipment is mostly just used for fun, but sometimes it is used for jumping. The donut has eight sides, so it is a octagon. The measure of the angles in this shape can be found by taking the number of sides: 8, and then subtracting two from that. Then you take 5 and multiply that by 180 which is equal to 1,080. In order to find the measure of each individual angle you must divide 1,080 by 8 which equals 135. All of the angles in this octagon are congruent so this shape is a regular octagon.
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