Consolidate understanding of how to calculate the value of one unknown angle in a triangle by using this resource.

This Year 6 Angles in a Triangle (One Unknown Angle) Fluency Matrix worksheet helps children use the knowledge that all angles in a triangle add to 180 degrees to calculate the value of one missing angle. Over nine questions, children will calculate the one missing angle in a triangle using given facts, beginning with pictorial representations and using values that are multiples of 5. All answers are also included so that marking is as easy as possible!

Varied fluency and reasoning and problem solving resources are also available for this small step.