MyMathKidK-8 Curriculum

Grade 1 Geometry: Sides and Corners

Count sides and corners of shapes

What You'll Learn

Count the sides of a shape
Count the corners (vertices) of a shape
Describe shapes by their attributes

📖What are Sides and Corners?

Sides are the straight lines that make a shape. Corners (also called vertices) are where two sides meet.

✏️Counting Sides and Corners

Triangle: 3 sides, 3 corners. Square: 4 sides, 4 corners. Pentagon: 5 sides, 5 corners. Hexagon: 6 sides, 6 corners.

💡Remember

Circles have no sides and no corners - they are round all the way around!

Worked examples

Real problems from the practice worksheets, solved one step at a time.

Example 1
How many sides does this shape have?
1. Trace each straight side of the shape with your finger.
2. Count them: 1, 2, 3, 4.
3. The shape has 4 sides.
Answer: 4
Example 2
How many sides and corners does a square have in all?
1. A square has 4 sides and 4 corners.
2. Count on from 4: 5, 6, 7, 8.
3. 4 + 4 = 8
Answer: 8
Example 3
Zoe draws 2 squares. How many sides are there in all?
1. A square has 4 sides.
2. A square has 4 sides.
3. 4 + 4 = 8
Answer: 8

Practice Worksheets

Sides and Corners 1

Count the sides and corners of shapes

Sides and Corners 2

More sides and corners practice

Sides and Corners 3

Additional sides and corners practice

Sides and Corners 4

Keep counting sides and corners

Sides and Corners 5

Master sides and corners