Week 2: Measurement

Mastering units of length, calculating perimeter of complex shapes, and determining area using formulas.

mm

Week 2 Term 1 2026

Units of Length

✓ Determine best units
✓ Convert between mm, cm, m, km

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P

Week 2 Term 1 2026

Perimeter

✓ Circumference of Circles
✓ Composite Shapes

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A

Week 2 Term 1 2026

Area

✓ Use Area Formulas
✓ Solving Problems

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Week 2 Term 1 2026

Units of Length

Learning Intent: Determine best units & convert between them.

Warm Up: Estimation

Which unit would you use to measure...

An Ant

mm

A Phone

cm

Swimming Pool

m

To Brisbane

km

The Conversion Staircase

km (Kilometres)

m (Metres)

cm (Centimetres)

mm (Millimetres)

Click a step to see conversion rules

Select a unit on the stairs

See how to convert up and down.

Quick Converter

to

Week 2 Term 1 2026

Perimeter & Circumference

Learning Intent: Calculate perimeter of 2D and composite shapes.

1. Select Shape

2. Adjust Dimensions

Length (L)

Width (W)

Calculation

The red line represents the Perimeter.

Key Formulas

Rectangle P = 2(l + w)

Square P = 4s

Triangle P = a + b + c

Circle C = 2πr

Week 2 Term 1 2026

Area of Shapes

Learning Intent: Use best formulas to calculate area of composite shapes.

Area Formulas Cheat Sheet

L W

Rectangle

Area = length × width

r

Circle

Area = πr²

b h

Triangle

Area = ½ × base × height

Composite Shape Challenge

Calculate the area of this "House" shape.