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Chapter 5 Angles and Trigonometry

5.1 Angle Properties of Triangles and Quadrilaterals

A quadrilateral is a polygon which has 4 vertices and 4 sides enclosing 4 angles and the sum of all the angles is 360°. While the angle sum property of a triangle theorem states that the sum of all three internal angles of a triangle is 180°. In this section, we learn about Angle Properties of Triangles and Quadrilaterals, parallel lines, alternating angles, corresponding angles, quadrilateral angles sum, triangle angle sum, angles sum.


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A quadrilateral is a polygon which has 4 vertices and 4 sides enclosing 4 angles and the sum of all the angles is 360°. While the angle sum property of a triangle theorem states that the sum of all three internal angles of a triangle is 180°.  In this section, we learn about Angle Properties of Triangles and Quadrilaterals, parallel lines, alternating angles, corresponding angles, quadrilateral angles sum, triangle angle sum, angles sum.

5.1 Angle Properties of Triangles and Quadrilaterals

Using the sum of angles in a triangle and in quadrilateral.

Angle Properties of Triangles and Quadrilaterals - Angle Properties of Triangles and Quadrilaterals, parallel lines, alternating angles, corresponding angles, quadrilateral angles sum, triangle angle sum, angles sum.

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