Sorting Triangles and Quadrilaterals

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Objective

I can sort triangles and quadrilaterals by their attributes.

Part 1 of 4

Warm-up video

mathantics · 7:40Vetted channel

We don't generate video — this one is by mathantics 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 4

Key concepts

3 concepts

  1. 1

    Triangles are polygons that always have 3 sides and 3 angles.

  2. 2

    Triangles can be classified by their sides and by their angles.

  3. 3

    The three classifications for triangles based on their sides are: equilateral, isosceles, and scalene.

Part 3 of 4

Practice

9 questions

1

A triangle has angles measuring 60 degrees, 60 degrees, and 60 degrees. What type of triangle is it, based on its angles?

2

If a triangle has one angle that measures 90 degrees, what type of triangle is it?

Part 4 of 4

Exit ticket

Quick comprehension check

Draw an example of each of the following triangles: acute triangle, obtuse triangle, and right triangle. Label each.

Sample answer included in the free materials

Get the materials

Teacher guide, student handout, and slides — free, in Google Docs format

  • Teacher Guide

    Complete lesson plan with answer keys and alternate activities

  • Student Handout

    Printable worksheet

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