How to find the area will depend on which type of pentagon you have and what information you know about your pentagon. The area, A, of a pentagon is the space inside it's five straight sides. The apothem is used to calculate the area of a pentagon. To find the perimeter of an irregular pentagon, you must measure and add up the five sides.Ī line segment drawn from the center of a regular pentagon perpendicular to a side is called the apothem. There is a simple formula to find the perimeter of a regular pentagon if you know one side length. The perimeter of a pentagon is the distance around its five straight sides. When you find a five-sided shape, you can describe it as a pentagonal shape. How To Draw A Pentagon Please Like & Subscribe To johnnybo圓217 My Channel Thank You triangle rectangle square How To Draw An Impossible Star Step By Step. Find high-quality royalty-free vector images that you wont find anywhere else. Real life examples of irregular pentagons Choose from Drawing Of Pentagon Shapes stock illustrations from iStock. department of defense building in Washington D.C. Whether it is an irregular pentagon with varying side lengths or a regular pentagon with equal sides and equal angles, there are many real-life examples of pentagons: If you look for a pentagon shape around you, you will surely find it. Irregular pentagons can be a convex pentagon or a concave pentagon, but they must have five different-length sides.Ĭonvex pentagon – No internal angles can be more than 180°Ĭoncave pentagon – One interior angle that is greater 180°Ī common example of a convex irregular pentagon is the home plate on a baseball field.Īll pentagons (regular and irregular) are five-sided shapes, with five interior angles and five exterior angles. Just like any regular polygon, going around a pentagon completes one full circle, so the exterior angles are found by dividing 360° by the number of sides, in this case, 360 ° 5 = 72 ° \frac=72° 5 360° = 72°. Regular pentagons do not have parallel sides.
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