Mathematics·Geometry·conceptual
Angle Sum Rules
Know that angles at a point sum to 360° (one whole turn), angles on a straight line sum to 180°, and vertically opposite angles are equal; use these facts to find missing angles
Suggested ages 9–10
Learning journey
Your child is learning to measure and work with angles using protractors, classify shapes by their properties, and understand transformations like reflections and translations while exploring how angles relate to each other.
Evidence of understanding
- State that two angles on a straight line add to 180°
- Explain that four right angles at a point make 360°
- Identify 270° as three right angles
Assessment prompt
If three angles meet at a point and two of them are 120° and 95°, can Angle Sum Rules work out the third angle — knowing all the angles at a point add up to 360°?
Standards alignment
No external standards are linked to this topic.