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### Grade 7 - Mathematics7.3 Polygons and Triangles

 Points to Remember: Polygons: A simple closed figure bound by line segments is called a polygon. The line segments by which a polygon is bound are called its sides. The sides of the polygon do not cross each other Exactly two sides meet at every vertex. Circle is not a polygon as this closed figure is not bounded by line segments. Triangle: A polygon with three sides is called a triangle. A triangle is named by its vertices. If D, E, and F are the vertices of a triangle, it is called triangle DEF. The symbol for a triangle is and is read as "Triangle". "DEF" is read as "Triangle DEF". Directions: Select if the following statements are true or false. Draw at least 5 examples of your own for polygons and name their properties.
 Q 1: All triangles are polygons, but all polygons are not triangles. FalseTrue Q 2: If a point does not lie in the interior of a triangle or on the triangle, then it lies on the exterior of the triangle.TrueFalse Q 3: A triangle is a simple closed figure.TrueFalse Q 4: In ABC, the points A, B and C are the vertices of the triangle .TrueFalse Q 5: If A, B, and C are three points, then the union of AB, BC and CA is triangle ABC.TrueFalse Q 6: All polygons are triangles, but all triangles are not polygons.TrueFalse Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!