# We are going to learn 2-D and 3-D Shapes.

## Presentation on theme: "We are going to learn 2-D and 3-D Shapes."— Presentation transcript:

We are going to learn 2-D and 3-D Shapes

Let’s see what do you know?

What am I? I have 2 pairs of equal sides 4 right angles

What am I? I have 4 sides all the same I have 4 corners.

What am I? I’m a pyramid like 3-D shape with a circular base.

2 equal sized circular ends.
What am I? I’m a long tube with 2 equal sized circular ends. Click here for the Answer

2-D Shapes

Right-angled triangle
2-D Shapes Right-angled triangle Isosceles triangle Scalene triangle No equal sides No equal angles One of its angles is a right angle (90°) 2 equal sides 2 equal angles Equilateral triangle 3 equal sides 3 equal angles of 60°

More 2-D Shapes Pentagon Hexagon 5 sides. have 6 sides Circle No sides
No angles

More 2-D Shapes Square Trapezoid Square Rhombus Rectangle Rhombus
4 equal sides 4 right angles Kite 2 pairs of equal No parallel sides. One pair of parallel sides of different lengths Rhombus Rectangle Rhombus Rectangle Parallelogram 2 pairs of equal sides 4 right angles 2 pairs of equal sides Opposite sides are parallel Opposite angles are equal 4 equal sides Opposite sides are parallel Opposite angles are equal

3-D Shapes 3-D means the shape has 3 dimensions; length, width and depth.

3-D Shapes Sphere Cylinder Cone Long tube with
2 equal sized circular ends. Every point on the surface of the sphere is the same distance from the centre. A pyramid with a circular cross section. The point of the cone is directly above the centre of the circular base.

3-D Shapes Six faces which are all rectangles
Corners Edges Six faces which are all squares Faces Corners Edges

3-D Shapes

3-D Shapes

Quiz 1. A triangle with three equal sides is called
an isosceles triangles a scalene triangle an equilateral triangle

Let us review Back to Question 1

2. A 2D shape with 6 sides is called
a quadrilateral a pentagon a hexagon

Back to Question 2

3. I have two pairs of equal sides. My opposite sides are parallel
3. I have two pairs of equal sides. My opposite sides are parallel. I have no right angles. What am I? Rectangle Parallelogram Kite

Let us review Trapezoid Square Rhombus Rectangle Parallelogram
4 equal sides 4 right angles Kite 2 pairs of equal No parallel sides. One pair of parallel sides of different lengths Rhombus Rectangle Parallelogram 2 pairs of equal sides 4 right angles 2 pairs of equal sides Opposite sides are parallel Opposite angles are equal 4 equal sides Opposite sides are parallel Opposite angles are equal Back to Question 3

4. Which of these shapes has no lines of symmetry?
Square Scalene triangle Rectangle

Let’s take another look.

5. I have four equal sides and four right angles. What am I?
Square Rectangle Rhombus

Rhombus Rectangle Back to Question 5

6. The distance halfway across a circle is called

Let us review Circle No sides No angles Back to Question 6

7. A triangle with two equal angles is called
Equilateral triangle Isosceles triangle Scalene triangle

Let us review Back to Question 7

8. A 3-D tube shape with 2 equal sized circular ends.
Sphere Circle Cylinder

Take another look! Sphere Cylinder Back to Question 8

9. A shape with 6 rectangle faces, 8 corners and 12 edges.
Cuboid Cube Hexagon

Let us review Hexagon Back to Question 9

Take Another Look

Now, let’s have some fun at polygon Land. You'll find hundreds of polygons to drag anywhere you want. Be a creative designer at polygon Land. These are examples of what you can do there. Be sure to read the instructions before you play. Ready? Click here.

Class Activity Find more about 3-D shapes with your partner. Click on the shapes below and print them then follow the instructions on the sheet.

With a partner, make a chart like the one below and use it to find 3-D shapes around the classroom. Answer each question about the properties of the object and then see if you can correctly identify and name the object.   Number of faces Number of vertices Number of edges Name of shape

Homework Choose a 3D shape and design a promotion poster for it. What makes this shape special? What are its properties? What is it used for/where is it seen (for example, packaging, buildings) and what makes it a good shape for this use?

You made it. Hip, Hip, Hooray!

Just kidding, this is it ! The End.