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February 08, 2013 Warm-Up 1. The name of a triangle with no congruent sides. scalene 2. The name of a triangle with a 90 angle and two congruent sides. isosceles right 3. A quadrilateral with only one pair of parallel sides. trapezoid 4. A figure with at least 3 straight lines that do not cross. polygon February 08, 2013 What kinds of angles are these? What kinds of angles are these? Corresponding angles Vertical angles Adjacent angles February 08, 2013 February 08, 2013 Find the measure of the unknown angle. February 08, 2013 Find the measure of the unknown angle in the quadrilateral. February 08, 2013 Divide each polygon into triangles to find the sum of its angle measures. February 08, 2013 February 08, 2013 February 08, 2013 February 08, 2013 February 08, 2013 February 08, 2013 Find the measure of the third angle in each triangle, given two angle measures. Then classify the triangle. 99°, 34° 12°, 90° 44°, 66° Ashley has 3 planks that are each 4 feet long. If she uses the planks to form a triangular flower bed, what will be the measure of each angle in the triangle? February 08, 2013 February 08, 2013