Angles in Triangles (A) WORKSHEET
Suitable for Year groups: Year 7, Year 8
GCSE Tier: Foundation
Targeting grades: 1-3
Prerequisite knowledge: Using bar models to solve missing number problems. Addition and subtraction within 180.
Learning Objective: Derive and use the sum of angles in a triangle.
Angles in Triangles (A) WORKSHEET DESCRIPTION
This worksheet will help students practise calculating missing angles in triangles using the angle sum rule.
Section A begins with a guided example, and bar models are used throughout to support calculations.
Section B asks learners to decide whether triangles are feasible or not based on their angle sum, providing a selection of both examples and non-examples.
In Section C, pupils tackle ten minimally different questions that build reasoning skills step by step.
Section D extends the practice with a wider variety of angle problems, including those where angles are expressed in ratio.
All worksheets are created by the team of experienced teachers at Cazoom Maths.
-Worksheet.jpg?w=3840 "Angles in Triangles (A)")
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Frequently Asked Questions
Derive and use the sum of angles in a triangle.