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Year 4 · Mathematics · Measurement

AC9M4M04

estimate and compare angles using angle names including acute, obtuse, straight angle, reflex and revolution, and recognise their relationship to a right angle

The content description above is Australian Curriculum, Assessment and Reporting Authority (ACARA)’s own wording, reproduced unmodified from the Australian Curriculum v9.0, read in August 2026, and licensed CC BY 4.0.

© Australian Curriculum, Assessment and Reporting Authority (ACARA) 2010 to present, unless otherwise indicated. This material was downloaded from the Australian Curriculum website and was not modified. ACARA does not endorse this product and is not affiliated with it.

Taught alongside it

The rest of Measurement in Year 4.

AC9M4M01

interpret unmarked and partial units when measuring and comparing attributes of length, mass, capacity, duration and temperature, using scaled and digital instruments and appropriate units

AC9M4M02

recognise ways of measuring and approximating the perimeter and area of shapes and enclosed spaces, using appropriate formal and informal units

AC9M4M03

solve problems involving the duration of time including situations involving “am” and “pm” and conversions between units of time

The same idea, year by year

Where AC9M4M04 comes from and where it goes, for a student working below or above Year 4.

  1. Year 3AC9M3M01identify which metric units are used to measure everyday items; use measurements of familiar items and known units to make estimates
  2. Year 3AC9M3M02measure and compare objects using familiar metric units of length, mass and capacity, and instruments with labelled markings
  3. Year 3AC9M3M03recognise and use the relationship between formal units of time including days, hours, minutes and seconds to estimate and compare the duration of events
  4. Year 3AC9M3M04describe the relationship between the hours and minutes on analog and digital clocks, and read the time to the nearest minute
  5. Year 3AC9M3M05identify angles as measures of turn and compare angles with right angles in everyday situations
  6. Year 3AC9M3M06recognise the relationships between dollars and cents and represent money values in different ways
  7. Year 5AC9M5M01choose appropriate metric units when measuring the length, mass and capacity of objects; use smaller units or a combination of units to obtain a more accurate measure
  8. Year 5AC9M5M02solve practical problems involving the perimeter and area of regular and irregular shapes using appropriate metric units
  9. Year 5AC9M5M03compare 12- and 24-hour time systems and solve practical problems involving the conversion between them
  10. Year 5AC9M5M04estimate, construct and measure angles in degrees, using appropriate tools including a protractor, and relate these measures to angle names

Planning against AC9M4M04?

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