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geom Section 4.5 Isosceles and Equilateral Triangles.notebook November 03, 2016 11/3/16 Warm Up Problem Find the measure of each missing angle. 30 75 y x 60 60 geom Section 4.5 Isosceles and Equilateral Triangles.notebook Concept 810 Quiz Write the equation of the line that is perpendicular to the line y = 3x9 and goes through the point (9,3). November 03, 2016 geom Section 4.5 Isosceles and Equilateral Triangles.notebook November 03, 2016 Section 4.5 Isosceles and Equilateral Triangles Goal: use and apply properties of isosceles and equilateral triangles Parts of an Isosceles Triangle Legs: congruent sides Leg Leg Base: third side Base Base Angles: formed by base and legs Vertex Angle: formed by congruent legs geom Section 4.5 Isosceles and Equilateral Triangles.notebook If we draw an angle bisector... What proves the two halves congruent? What do we know about the two base angles? November 03, 2016 geom Section 4.5 Isosceles and Equilateral Triangles.notebook November 03, 2016 Theorem 43 Isosceles Triangle Theorem If two sides of a triangle are congruent, then the two angles opposite those sides are _____________. geom Section 4.5 Isosceles and Equilateral Triangles.notebook November 03, 2016 Theorem 44 Converse of the Isosceles Triangle Theorem If two angles of a triangle are congruent, then the two sides opposite those angles are ___________. geom Section 4.5 Isosceles and Equilateral Triangles.notebook Let's Practice... Find the value of x in each triangle. November 03, 2016 geom Section 4.5 Isosceles and Equilateral Triangles.notebook November 03, 2016 Corollary: a theorem that can be proved easily using another theorem Corollary to Theorem 43 If a triangle is equilateral, then it is ___________ Corollary to Theorem 44 If a triangle is equiangular, then it is ___________ geom Section 4.5 Isosceles and Equilateral Triangles.notebook November 03, 2016 Do these examples in your notes: y 3x + 5 50 x 5x - 9 geom Section 4.5 Isosceles and Equilateral Triangles.notebook Assignment pg. 254 (613) (3032) November 03, 2016
