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Intro to 2D Shapes
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 Show answers to discussion questions
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 We’ll learn how to identify shapes like triangles, squares and circles!
 We'll also learn that the shape of an object doesn't change even if we make it bigger or turn it.
 And we'll explore how this knowledge can help us send cards to our friends, earn badges, and even get honey from bees!

Discussion Questions

Before Video[Draw a rectangle on the board.] What is a “side” of a shape? Point to the sides on this shape.ANSWER

A side is a straight line on the outside of the shape.

A corner is a point on the outside of the shape where two sides meet.

It has 3 sides.

It has 3 corners.

No. It does not have any sides or corners.


After Video[Draw a square on the board] What shape is this?ANSWER

A square.

a rectangle.

Yes. It still has no sides and no corners, so it is still a circle.

Yes. It still has four sides and four square corners, so it is still a rectangle.

A shape is a hexagon if it has six sides.



Vocabulary

Circle
DEFINE
A round shape with no sides or corners.

Round
DEFINE
Shaped like a circle.

Side
DEFINE
A straight line on the outside of a shape.

Corner
DEFINE
Where two sides meet.

Triangle
DEFINE
A shape with three sides.

Rectangle
DEFINE
A shape with four sides and four square corners.

Square corner
DEFINE
A special type of corner. It is the type of corner in a square or rectangle. When two sides are going in the exact opposite direction (such as one going up and down and the other going side to side), the corner they meet at is called a square corner.

Square
DEFINE
A special type of rectangle. It has four sides and four square corners. All of the sides are the same length.

Hexagon
DEFINE
A shape with six sides.

Circle
DEFINE

Reading Material
Download as PDF Download PDF View as Separate PageWHAT ARE 2D SHAPES?2D shapes are flat shapes. Some 2D shapes are circles, triangles, squares, rectangles, and hexagons. 2D shapes usually have sides and corners.
To better understand 2D shapes…
WHAT ARE 2D SHAPES?. 2D shapes are flat shapes. Some 2D shapes are circles, triangles, squares, rectangles, and hexagons. 2D shapes usually have sides and corners. To better understand 2D shapes…LET’S BREAK IT DOWN!
What is a circle?
A circle is a round shape with no sides and no corners. A circle looks like the top of a pancake. If you change the size or color of a circle it is still a circle. It has no sides and no corners.
What is a circle? A circle is a round shape with no sides and no corners. A circle looks like the top of a pancake. If you change the size or color of a circle it is still a circle. It has no sides and no corners.What is a triangle?
A shape with 3 straight sides is called a triangle. Any shape that has three straight sides is a triangle. You can turn the shape or change its size and it is still a triangle!
What is a triangle? A shape with 3 straight sides is called a triangle. Any shape that has three straight sides is a triangle. You can turn the shape or change its size and it is still a triangle!What is a rectangle?
A rectangle has 4 sides and 4 square corners. A corner is where 2 sides meet. A square corner looks like the corner in a capital letter L. A rectangle has 2 pairs of sides that are the same length.
What is a rectangle? A rectangle has 4 sides and 4 square corners. A corner is where 2 sides meet. A square corner looks like the corner in a capital letter L. A rectangle has 2 pairs of sides that are the same length.A square is a special rectangle.
A square also has 4 sides and 4 square corners. A square is a rectangle where all of the sides are the same length.
A square is a special rectangle. A square also has 4 sides and 4 square corners. A square is a rectangle where all of the sides are the same length.What is a hexagon?
There is a shape in a honeycomb. Count the sides: 1, 2, 3, 4, 5, 6. The shape has 6 sides. A shape with 6 sides is called a hexagon.
What is a hexagon? There is a shape in a honeycomb. Count the sides: 1, 2, 3, 4, 5, 6. The shape has 6 sides. A shape with 6 sides is called a hexagon. 
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Science & Math$_{/yr}

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[Draw a circle on the board] What shape is this? How do you know?
[Draw a triangle sitting on a side on the board] What shape is this? How do you know?
[Draw a bigger triangle, sitting on a vertex, on the board.] What shape is this? How do you know?
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