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Home›Class 7›Mathematics›Lesson 2: Triangle, Quadrilateral and Polygon›Polygons

Lesson 2 · Triangle, Quadrilateral and Polygon

Polygons

MathematicsSubject

14 minEstimated read

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Lesson 2 topics

Constructing Triangles Quadrilaterals and Their Properties Polygons

Quick Facts

Lesson: 2: Triangle, Quadrilateral and Polygon
Topic: Polygons
Domain: Geometry

Cut any polygon into triangles from one corner. An n sided shape gives n - 2 triangles, so the angles total (n - 2) x 180.

Study Tip

When a question gives you an angle and asks for the number of sides, go through the exterior angle: 360 divided by the exterior angle gives n in one step.