In a triangle there room three sides. In theadjoining figure of a triangle abc we can observe that the variety of trianglescontained = 3 – 2 = 1.

You are watching: How many triangles are there in a pentagon In a square there are four sides.Number of triangles included in a quadrilateral = 4 – 2 = 2.

In the adjoining figure of a quadrilateralABCD, if diagonal BD is drawn, the quadrilateral will certainly be separated into twotriangles i.e. ∆ABD and also ∆BDC. In a pentagon over there are five sides. Numberof triangles contained in a pentagon = 5 – 2 = 3.

In the adjoining number of a pentagonABCDE, on joining AC and also AD, the given pentagon is divided into 3 trianglesi.e. ∆ABC, ∆ACD and ∆ADE. In a hexagon there are six sides. Number oftriangles consisted of in a hexagon = 6 – 2 = 4.

In the adjoining figure of a hexagon ABCDEF,on authorized AC, advertisement and AE, the offered hexagon is divided into four triangles i.e.∆ABC, ∆ACD, ∆ADE and also ∆AEF. Polygons

Polygon and its Classification

Terms regarded Polygons

Interior and Exterior that the Polygon

Convex and also Concave Polygons

Regular and Irregular Polygon

Number the Triangles consisted of in a Polygon

Angle Sum property of a Polygon

Problems on edge Sum building of a Polygon

Sum the the internal Angles the a Polygon

Sum the the Exterior angle of a Polygon