Cogito
Grade 1 Math · Chapter 9 · Lesson 3
Naming Solid Shapes
Meet the shapes you can pick up and hold.
10 problems · about 12 minutes · 1.G.A.1
What this lesson teaches
The child names cubes, rectangular prisms, cones, cylinders, and spheres, and describes their flat faces.
- Solid shapes can be picked up.
- The flat parts are called faces.
- Shapes with no flat face on the ground roll.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
4 problemsReview — Naming Flat Shapes: A shape has 6 straight sides. What is it?
Answer A hexagon.
Why 6 sides makes a hexagon.
Review — What Makes a Shape a Shape?: How many corners does a triangle have?
Answer 3
Why 3 sides make 3 corners.
Review — When the Ones Make a Ten: 16 + 17 = ?
Answer 33
Why 2 tens and 13 ones becomes 3 tens and 3 ones.
Review — Adding Two-Digit Numbers: 21 + 14 = ?
Answer 35
Why 3 tens and 5 ones is 35.
Warm Up
Straightforward practice. Get the method working first.
3 problemsA can of soup is shaped like what?
Answer A cylinder.
Why A can is a cylinder.
How many flat faces does a sphere have?
Answer 0
Why A sphere has no flat faces.
How many flat faces does a cube have?
Answer 6
Why Think of a dice.
Build It Up
The same ideas with more to keep track of.
1 problemHow many flat faces does a cylinder have?
Answer 2
Why Top and bottom.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsWhich one rolls?
Answer A sphere.
Why Flat faces stop a shape rolling.
In the Toy Box: A shape is round everywhere and rolls any way. What is it?
Answer A sphere.
Why A sphere is round everywhere, like a ball.