AC9M4M04 Year 4 Mathematics

This Content Descriptor from Year 4 Mathematics provides the specific knowledge and skills students should learn. Use it to plan lessons, create learning sequences, and design assessments that align with the Australian Curriculum v9.

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

Elaborations

• 1 classifying the interior angles of a range of shapes, using examples of angles to identify acute, obtuse, right and reflex angles
• 2 identifying angles within the environment and estimating whether they are acute, obtuse right or reflex
• 3 creating a right-angle template using cardboard or a double-folded piece of paper and using it to compare angles in the environment, commenting on whether they are smaller than or greater than a right angle
• 4 using different measuring tools such as a spirit level or set squares to determine whether lines or objects are straight, square or perpendicular (at right angles)

Related Achievement Standards