Isosceles Triangles
Grade 9 · Math · 45 min
What's Included
Learning Objective
I can calculate the missing angles or side lengths in an isosceles triangle.
Warm-Up Video
Unknown Channel · 5:00
Congruent legs and base angles of isosceles triangles | Congruence | Geometry | Khan Academy
Practice Questions
7 questions · Short answer
Exit Ticket
Quick comprehension check
“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. ”
Complete Lesson Package
Get all 3 ready-to-use resources:
Teacher Guide
Student Doc
Slides
