Your Name Mrs. Theo 5.1 Angles in Triangles
5.1 Angles of Triangles 2021.notebook
5.1 Angles in Triangles
October 18, 2021
Your Name Mrs. Theo
/ / Notes
Lesson Objectives
? Find interior and exterior angles of triangles ? Classify triangles by side lengths and angle measures
Classifying Triangles by Side Length
Classifying Triangles by Angle Measure
5.1 Angles of Triangles 2021.notebook
Equilateral vs. Equiangular
Triangles
Other Polygons
October 18, 2021
Equilateral
Equilangular
Equilateral
Equilangular
Both = Regular Polygon
Angle Measures in Triangles
5.1 Angles of Triangles 2021.notebook
Leg
Leg
Base
Base
October 18, 2021
Leg
Leg
Base Angles are (in isos triangles)
Triangle Sum Theorem
The sum of the measures of the interior angles of a triangle is 180o.
5.1 Angles of Triangles 2021.notebook
Exterior Angle Theorem The measure of an exterior angle in a triangle is equal to the sum of the nonadjacent interior angles.
October 18, 2021
Corollary to the Exterior Angle Theorem The acute angles of a right triangle are complementary.
5.1 Angles of Triangles 2021.notebook
Example #1 The angles in a triangle are in a ratio of 2:3:10. Find the measure of all 3 angles.
October 18, 2021
Example #2
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