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A diagonal shares a rectangle into equal areas

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Perimeter and Area · Explore triangle area by cutting a rectangle · 3:42

You'll learn: Explain half-area by cutting and matching

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A diagonal shares a rectangle into equal areas

3:42

Playing

A diagonal shares a rectangle into equal areas

You'll learn: Explain half-area by cutting and matching

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Same topic

Explore triangle area by cutting a rectangle

2

Different triangles can share the same area
3:46
Different triangles can share the same area
You'll learn: Extend the rectangle comparison using two pieces
Use triangle pieces in an area puzzle
3:48
Use triangle pieces in an area puzzle
You'll learn: Calculate a composite region with the taught method

Next topic

Recognise the need for fractional units

2

Whole units are sometimes too coarse
3:26
Whole units are sometimes too coarse
You'll learn: Recognise why a smaller unit is needed
Share one whole fairly
3:29
Share one whole fairly
You'll learn: Build a unit fraction by equal sharing

Next topic

Explain why equal parts matter

2

Equal parts make a valid fractional unit
3:37
Equal parts make a valid fractional unit
You'll learn: Distinguish equal shares from arbitrary pieces
Different shapes can have equal area
3:35
Different shapes can have equal area
You'll learn: Recognise equal-area parts without requiring identical shapes

Next topic

Interpret numerator and denominator

2

The denominator names the unit
3:26
The denominator names the unit
You'll learn: Identify the size of one equal part
The numerator counts those units
3:33
The numerator counts those units
You'll learn: Connect repeated unit fractions to fraction notation

Next topic

Locate fractions on a number line

2

Fractions are numbers with positions
3:43
Fractions are numbers with positions
You'll learn: Locate fractional lengths between whole numbers
Keep the same fractional step beyond one
3:47
Keep the same fractional step beyond one
You'll learn: Locate fractions across several whole intervals

Next topic

Understand fractions beyond one whole

2

Several parts can exceed one whole
3:41
Several parts can exceed one whole
You'll learn: Connect improper fractions to complete wholes and a remainder
Two forms describe the same amount
3:39
Two forms describe the same amount
You'll learn: Convert mixed and improper forms with a model

Next topic

Explain equivalent fractions

3

More pieces can show the same amount
3:40
More pieces can show the same amount
You'll learn: Explain equivalence by subdivision
Scale both counts together
3:45
Scale both counts together
You'll learn: Connect subdivision to multiplying numerator and denominator by the same positive whole number
Equivalent fractions share one position
3:39
Equivalent fractions share one position
You'll learn: Check equivalence on a number line