3-5 Parallel Lines and Triangles I can apply the triangle angle sum theorem to find the values of variables. I can apply the exterior angle theorem to.

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Presentation transcript:

3-5 Parallel Lines and Triangles I can apply the triangle angle sum theorem to find the values of variables. I can apply the exterior angle theorem to find the values of variables.

Triangle Angle-Sum Theorem The sum of the three interior angles of a triangle is 180 degrees.

Practice 1.Find the value of x, y, and z.

Practice 2. Find the value of x and each angle. Classify the triangle by the angles.

Exterior and Remote Interior Angles

Triangle Exterior Angle Theorem

Practice

4. Solve for x.