Isosceles Triangles
Grade 945 min
Learning Objective
I can calculate the missing angles or side lengths in an isosceles triangle.
Lesson Flow
Watch Video
Congruent legs and base angles of isosceles triangles | Congruence | Geometry | Khan Academy
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Practice
7 questions • Short answer
Exit Ticket
“In an isosceles triangle, the lengths of the two equal sides are 8 cm each, and the base angle measures 50°. Calculate the measure of the vertex angle. Show all work. An isosceles triangle has a vertex angle of 30° and the lengths of the equal sides are each 12 cm. Calculate the length of the base. Show all work. ”
Teacher Guide
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