TalentJR apps
An angle measures how much something turns. A quarter turn is 90° (a right angle), a half turn is 180° (a straight angle) and a full turn is 360°. Angles less than 90° are acute, between 90° and 180° obtuse, and between 180° and 360° reflex. Angles that together make a straight line add up to 180°, and angles around a point add up to 360°.
✓ You passed this lesson’s test.
Know the totals — “a straight line makes 180°, a full turn makes 360°”
Use it for: Reading a compass, clock hands, doors opening, drawing with a protractor, and the basic geometry chapter of Class 6 maths.
Check: 40 + 75 + 65 = 180 ✓
▶ Watch it animatedWork it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
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.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India and visit homes in selected cities. Tell us what you need and our team will call you with timings and fees.