Isosceles Triangles
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Objective
I can calculate the missing angles or side lengths in an isosceles triangle.
Part 1 of 3
Warm-up video
Unknown Channel · 5:00
We don't generate video — this one is by Unknown Channel on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 3
Practice
7 questions
Define an isosceles triangle and explain the significance of its base angles.
In an isosceles triangle, if the lengths of the two equal sides are 7 cm each and the base is 10 cm, calculate the measure of the vertex angle.
Part 3 of 3
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. ”
Sample answer included in the free materials
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Teacher Guide
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Student Handout
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