Measuring angles (age 11+)
Draw and measure line segments and angles accurately using ruler and protractor, and interpret scale drawings to extract real measurements
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Teaching Table
Set out your lesson
“If your child is given an architect's floor plan where 1 cm represents 2 m, can they measure a room on the plan and work out its real-world dimensions?”
Full guide and materials
- Activity. Draw and measure line segments and angles accurately using ruler and protractor, and interpret scale drawings to extract real measurements
What to notice. Draw a triangle accurately given two sides and the included angle (SAS) • Measure angles in a geometric figure to the nearest degree using a protractor • Read a scale drawing to determine actual lengths, explaining the scale used
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If your child is given an architect's floor plan where 1 cm represents 2 m, can they measure a room on the plan and work out its real-world dimensions?
Draw and measure line segments and angles accurately using ruler and protractor, and interpret scale drawings to extract real measurements
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Check understanding
- Draw a triangle accurately given two sides and the included angle (SAS)
- Measure angles in a geometric figure to the nearest degree using a protractor
- Read a scale drawing to determine actual lengths, explaining the scale used
“If your child is given an architect's floor plan where 1 cm represents 2 m, can they measure a room on the plan and work out its real-world dimensions?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 11–13
Standards