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3D/2D Shapes & Angles

Looking at what 2 and 3D shapes are and what types of angles are used
by

Scott Elliott

on 2 February 2014

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Transcript of 3D/2D Shapes & Angles

3D Shapes

2D Shapes

Angles

Lesson
Objectives

To be able to name at least 3 2D shapes
To be able to name at least 3 3D shapes
To produce a net of at least 2 shapes
To work out the angles of at least 3 2D shapes
2D shapes
Can you name any of these?
Pentagon
Heptagon
Triangle
Square
Circle
Nonagon
3D Shapes
Can you name any of these?
Cone
Sphere
Cube
Cylinder
Cuboid
Square based Pyramid
Triangular Prism
Tri
angles

Equilateral Triangle
Isosceles Triangle
Scalene Triangle
Three equal sides
Three equal angles, always 60
A triangle has three sides and three angles
The three angles always add to 180
Triangles can also have names that tell you what type of angle is inside:
Acute Triangle
All angles are less than 90
Right Triangle

Has a right angle (90 )

Obtuse Triangle

Has an angle more than 90
So with this in mind, it makes sense that we can combine all the names........
For example, a Right Isosceles Triangle
Has a right angle (90), and also two equal angles

any idea what the equal angles are?

That's right.....

60
Nets
Patterns that can be cut and folded to make a model of any 3D shape.
Square based Pyramid
Cylinder
Cube
Square based Pyramid
Cube
and finally .......
Two equal angles
Two equal sides
No equal sides
No equal angles
Tessellation
Tables
Full transcript