Cogito
Kindergarten Math · Chapter 8 · Lesson 3
Building Bigger Shapes
Small shapes make big ones.
10 problems · about 9 minutes · K.G.B.6
What this lesson teaches
The child composes larger shapes from smaller ones.
- Small shapes join to make bigger shapes.
- The same shape can be filled in more than one way.
- The pieces must fill it exactly, with no gaps.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
4 problemsReview — Solid Shapes: How many flat faces does a cube have?
Answer 6
Why Six.
Review — Naming Flat Shapes: How many corners does a rectangle have?
Answer 4
Why Four.
Review — Ten More on the Chart: Ten more than 32?
Answer 42
Why Forty-two.
Review — Counting by Tens: Five bundles of ten. How many?
Answer 50
Why Fifty.
Warm Up
Straightforward practice. Get the method working first.
3 problemsHow many triangles fill a hexagon?
Answer 6
Why Six.
How many rhombuses fill a hexagon?
Answer 3
Why Three.
How many trapezoids fill a hexagon?
Answer 2
Why Two halves.
Build It Up
The same ideas with more to keep track of.
2 problemsHow many triangles make one rhombus?
Answer 2
Why Two.
Can pieces overlap when filling a shape?
Answer No.
Why They must fit exactly.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
1 problemThe Triangles: How many triangles fill a hexagon?
Answer 6
Why Six.