Basic geometry: angles and turns — Maths worksheet

The method

Know the totals — “a straight line makes 180°, a full turn makes 360°”

1. Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°, reflex between 180° and 360°.
2. Angles on a straight line add up to 180°; angles around a point add up to 360°.
3. Each hour mark on a clock is 30° apart (360° ÷ 12).
4. Turning clockwise from North: 90° → East, 180° → South, 270° → West.

Use it for: Reading a compass, clock hands, doors opening, drawing with a protractor, and the basic geometry chapter of Class 6 maths.

Worked example: Three angles together make a straight line. Two of them are 40° and 75°. What is the third angle (in degrees)? → 65

✏️ Practice

Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.

🏁 Lesson 46 test

20 sums. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 🧭 Turn Tracker badge when you pass — and a certificate when you finish all 8 lessons of Part 6 · Class 6. You can still take the test without signing in.

🖨️ Class 6 Maths Worksheet: Angles and Geometry

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)