unit 6-12: visualising shapes starter eastbury mathematics department
TRANSCRIPT
Unit 6-12: Visualising shapes
Starter
EASTBURY MATHEMATICS DEPARTMENT
E C S LEARNING + COMMUNITY
The objective of this starter is:
• Visualise and sketch 2-D shapes in different orientations.
• Describe what happens and use the shapes to explain why.
Imagine a rectangular sheet of paper.
Cut along the diagonal to make two triangles.
Place the diagonals together in a different way.
What shape is formed?
A kite
Imagine two equilateral triangles.
What shape is formed?
Place them together, edge to edge.
A rhombus
Does it matter on what edge to place the equilateral triangle?No
Add a third equilateral triangle. What shape is formed?
An isosceles trapezium
Does it matter on what edge to place the third equilateral triangle? No
Add a fourth equilateral triangle?
A parallelogram
Does it matter on what edge to place the equilateral triangle?
What shape is formed?
Yes
What other shape can be formed?
Add a fourth equilateral triangle?
An equilateral triangle
What shape is formed?
Imagine two congruent isosceles triangles.
Put sides of equal length together.
Describe the resulting shapes.
A kite A parallelogram
A rhombus