Angle Sum Property of a Triangle

The video tutorial explains the angle sum property of triangles, demonstrating that the sum of the interior angles of a triangle is always 180 degrees. It uses various examples and activities, such as folding triangles and using properties of parallel lines, to find unknown angles in different triangles. The tutorial also covers the use of linear pairs and exterior angle properties to solve for angles in triangles.

How do you find the measures of angles in triangle DEF using the exterior angle property?

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What steps would you take to find the value of x in triangle ABC if one angle is given?

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Explain how to use the angle sum property to find the values of x, y, and z in triangle PRS.

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