Worked Example 1: Missing Angle
Part of Properties of Quadrilaterals · GCSE GCSE Mathematics revision
This study notes covers Worked Example 1: Missing Angle within Properties of Quadrilaterals for GCSE Mathematics. Revise Properties of Quadrilaterals in Geometry & Measures for GCSE Mathematics with 11 exam-style questions and 3 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 4 of 10 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 4 of 10
Practice
11 questions
Recall
3 flashcards
Worked Example 1: Missing Angle
A quadrilateral has angles of 85°, 110°, and 72°. Find the fourth angle.
Step 1 Use the angle sum
Angles in a quadrilateral = 360°
85° + 110° + 72° + x = 360°
Step 2 Solve
267° + x = 360°
x = 360° − 267° = 93°
Keep building this topic
Read this section alongside the surrounding pages in Properties of Quadrilaterals. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Properties of Quadrilaterals
Which of the following is a property of a parallelogram?
State THREE properties of a rhombus, at least one of which relates to its diagonals.
Quick Recall Flashcards
11 questions on Properties of Quadrilaterals — practise free
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