This worksheet is about the angles in a quadrilateral, which always add up to 360°.

**Example**

To find the angle x, we add up the existing angles and subtract this from 360°.

90 + 90 + 34 = 214

x = 360 - 214 = **146**°

In this worksheet, students calculate angles in quadrilaterals.

**Key stage:** KS 3

**Curriculum topic:**
Geometry and Measures

**Curriculum subtopic:**
Derive/Use the Sum of Angles for Deduction

**Difficulty level:**

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