AC9M4M04Year 4MeasurementPractised on site

AC9M4M04 — Year 4 Measurement

Official Curriculum Content Description:

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

Worked Examples (1)

Example 1Comparing & Ordering Angles
How does an angle of 126∘126^\circ compare to a right angle (90∘90^\circ) and a straight angle (180∘180^\circ)? Answer with a comparison phrase (e.g. "smaller than a right angle"), not a calculated angle.
Common mistake: Confusing acute and obtuse angle classifications or benchmark comparisons
Correct Answer:Between a right angle and straight angle
Worked Solution:
Since 90∘<126∘<180∘90^\circ < 126^\circ < 180^\circ, it is between a right angle and a straight angle (an obtuse angle).

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