Notes #__ Course__________________ Name____________________ Date________________ 4.5: Isosceles & Equilateral Triangles Objective: Using & applying properties of isosceles & equilateral triangles ο· Special Triangles: Isosceles Triangle: Equilateral Triangle: Corollary: Theorems Theorem Summary Diagram Theorem 4-3: Isosceles Triangle Theorem Theorem 4-4: Converse of the Isosceles Triangle Theorem Theorem 4-5 Corollary to Theorem 4-3 Corollary to Theorem 4-4 HW: pg. 269-272 #_________________________________________________ Notes #__ Course__________________ Name____________________ Date________________ 4.5: Isosceles & Equilateral Triangles Objective: Using & applying properties of isosceles & equilateral triangles Ex. #1: Find the value of x. a) b) x = _________________ x = _________________ Ex. #2: What are the measures of β π¨, β π©, πππ β π¨π«πͺ? πβ π¨ = __________________ πβ π© = __________________ πβ π¨π«πͺ =________________ Ex. #3: Suppose the triangles in Ex. #2 are isosceles triangles, where β π¨π«π¬, β π«π¬πͺ, πππ β π¬πͺπ© are vertex angles. If the vertex angles, each have a measure of 58°, what are πβ π¨ and πβ π©πͺπ«? πβ π¨ = __________________ πβ π©πͺπ« = __________________ HW: pg. 269-272 #_________________________________________________
© Copyright 2026 Paperzz