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## Using a protractor to measure angles in shapes

• Using a protractor to measure angles in shapes
• Course: Mathematics
• Section: Angles
• Outcome: Angle sum of straight lines, triangles and quadrilaterals.
• Activity Type: Printable
• Activity ID: 4534

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#### United States – Common Core State Standards expand/collapse

• ##### 4.G – Geometry
• Mathematics

• 4.G.1 – Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

• ##### 5.MD – Measurement & Data
• Mathematics

• 5.G.3 – Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.

• 5.G.4 – Classify two-dimensional figures in a hierarchy based on properties.

#### Australia – Australian Curriculum expand/collapse

• ##### Measurement and Geometry
• Geometric reasoning

• ACMMG141 – Investigate, with and without digital technologies, angles on a straight line, angles at a point and vertically opposite angles. Use results to find unknown angles

• ##### Measurement and Geometry
• Geometric reasoning

• ACMMG166 – Demonstrate that the angle sum of a triangle is 180 degrees and use this to find the angle sum of a quadrilateral

#### New Zealand – National Standards expand/collapse

• ##### 7.GM – Geometry and measurement
• 7.GM.4 – Sort two- and three-dimensional shapes into classes, defining properties and justifying the decisions made

#### United Kingdom – National Curriculum expand/collapse

• ##### KS2.Ma3 – Shape, space and measures
• Knowledge, skills and understanding

• Understanding measures

• KS2.Ma3.4 – Pupils should be taught to:

• KS2.Ma3.4.c – Recognise angles as greater or less than a right angle or half-turn, estimate their size and order them; measure and draw acute, obtuse and right angles to the nearest degree