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Cogito

Pre-K Math · Chapter 3 · Lesson 2

Practice Worksheet

Triangles

Three sides, three corners.

10 problems · about 6 minutes · PK.G.1

NameDate

Figure — use these to answer the problems

Turn the triangle. Count the sides.

Triangle

Straight sides

3

Corners

3

Turn it0

Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

5 problems

From “Circles and Squares”
How many corners does a square have?
Answer
From “Counting a Jumble”
How many? ●●●●●●●●
Answer
From “Zero Means None”
Nothing on the table. How many?
Answer
From “One More”
One more than 7?
Answer
From “Nine and Ten”
How many fingers on two hands?
Answer

Warm Up

Straightforward practice. Get the method working first.

2 problems

How many corners does a triangle have?
Answer
How many sides does a triangle have?
Answer

Build It Up

The same ideas with more to keep track of.

1 problem

How many corners does a triangle have?
Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

9
Which has more sides, a triangle or a square?
- A square.
- A triangle.
10
The Roof
A shape has three sides. What is it?
- A triangle.
- A square.