Lesson 5 Some Triangles, All Triangles
Let’s explore what makes a shape a triangle.
Warm-up Which One Doesn’t Belong: Shapes
Which one doesn’t belong?
Activity 1 Triangles and “Not Triangles”
These are triangles.
What is the same about all these triangles?
These are not triangles.
What makes these shapes different from the triangles?
Activity 2 Draw Triangles
Draw 3 different triangles.
Draw 3 different shapes that are not triangles.
Activity 3 Centers: Choice Time
Choose a center.
How Are They the Same?
Is this shape a triangle? Why or why not?