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Complementary, supplementary and opposite angles worksheet (with solutions)

Complementary, supplementary and opposite angles worksheet (with solutions)

Subject: Mathematics

Age range: 11-14

Resource type: Worksheet/Activity

Last updated

22 July 2026

pdf, 120.72 KB
pdf, 120.72 KB

A worksheet on identifying complementary, supplementary and vertically opposite angles and using their properties to find the value of a variable. Detailed solutions are included.

Get this resource as part of a bundle and save up to 48%

A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

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Complementary Supplementary Vertical & Triangle Angles Worksheets

A collection of three worksheets. Two worksheets on identifying complementary, supplementary and vertically opposite angles and using their properties to find the value of a variable. One worksheet on evaluating the third angle in a triangle given the other two using the fact that their sum is 180 degrees. Detailed solutions are included. Master angle facts and the angles in a triangle rule with this no-prep maths resource bundle! Perfect for KS3 (Year 8 and Year 9). Students apply algebra to form and solve multi-step linear equations for x. Includes full step-by-step answers keys! The ultimate no-prep bundle for mastering angle facts, triangles, and geometric equations! This comprehensive worksheet package is perfectly tailored for secondary maths classrooms. It beautifully bridges the gap between geometry rules and algebraic problem-solving, taking students from basic angle tracking to advanced multi-step equation solving. **What's Included in This Bundle:** **Unit 1: Complementary, Supplementary, & Vertically Opposite Angles** • Concept Mastery Table: Practice calculating complements and supplements for given values. • Geometric Diagrams: Solve for x using intersecting lines, right angles, and straight lines. • Algebraic Word Problems: Challenging worded scenarios requiring algebraic setup and calculation. • Detailed Solution Keys: Full, step-by-step mathematical breakdowns for every single problem. **Unit 2: Sum of Angles in a Triangle** • Visual Triangle Practice: Solve for the missing interior angle x inside a wide variety of triangle types. • Step-by-Step Answer Keys: Clear, complete solutions included for easy marking or self-checking. **Key Benefits for Your Classroom:** • **Print and Go:** Zero prep work required—simply download, print, and copy! • **Scaffolded Learning:** Tasks build naturally from basic numeric rules to multi-step linear equations. • **Self-Checking Friendly:** Detailed answer sheets make independent marking or peer-assessment easy. • **Versatile Use:** Ideal for main lessons, homework, revision, or cover work. **Curriculum Alignment (UK National Curriculum):** • KS3 Geometry: Apply angle facts to solve increasingly complex problems. • KS3 Geometry: Understand and use the sum of angles in a triangle, vertically opposite angles, and angles on a straight line. • KS3 Algebra: Form and solve multi-step linear equations with one variable. ________________________________________

£2.90
Bundle

GCSE 9-1 Angles, Lines and Triangles Bundle

A collection of 6 worksheets on angles, lines and triangles based on the GCSE 9-1 specification. The following worksheets are included: * Types of angles * Complementary, supplementary and opposite angles * Angles in parallel lines * Sum of angles in a triangle * Exterior Angles of a Triangle * Isosceles, Equilateral and Right-Angled Triangles Detailed solutions are included.

£4.95
Bundle

GCSE Maths-Geometry Revision Pack

A bundle of 10 worksheets (with detailed solutions) on Geometry topics appropriate for GCSE students. Each worksheet contains questions for students of various abilities. The topics covered by these worksheets include: * Angles in parallel lines * Complementary, supplementary and opposite angles * Sum of angles in a triangle * Interior and exterior angles in regular polygons * Units of measurement for area and volume * Area of trapezium * Circumference and area of a circle * Area and volume of a sphere * Volume and surface area of a cone * Density The pack is ideal for use in revision sessions or for individual study. The solutions provided are very clear and explanatory.

£7.90
Bundle

Angles in a triangle-Angles in parallel lines Worksheets (with solutions)

A collection of three worksheets on each of the following topics: * Angles in a triangle * Angles in parallel lines * Complementary, supplementary and opposite angles Solutions are included.

£2.80

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