Grade 6 · Year 7 · Class 6 · ages 11–12 · Geometry
Angles in triangles, on a line and round a point: Grade 6 practice
Finding a missing angle using 180° in a triangle or straight line and 360° round a point. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
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Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
Angles in a triangle and on a straight line add up to 180°. Angles round a point add up to 360°.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy Two angles of a triangle are 78° and 37°. The third angle is
Answer: 65
Medium Angles on a straight line add up to 180°. One angle is 157°, so the other is
Answer: 23
Challenge Angles on a straight line add up to 180°. One angle is 71°, so the other is
Answer: 109
More ways to practise angles in triangles, on a line and round a point
- Printable angles in triangles, on a line and round a point worksheet with an answer key (new questions every time)
- Angle Estimator: Guess the size of an angle in degrees and see how close you were.
- All Grade 6 practice · Geometry worksheets
Related skills
- Area of rectangles, triangles and parallelograms (Grade 6)
- Volume of cuboids (Grade 5)
- Circles, circumference and area (Grade 7)
- Surface area of cuboids (Grade 7)
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FAQ
Angles in triangles, on a line and round a point: questions
What grade is angles in triangles, on a line and round a point?
It is usually taught in Grade 6 (Year 7 in England, Class 6 in India, ages 11–12), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a angles in triangles, on a line and round a point question look like?
For example: "Angles on a straight line add up to 180°. One angle is 157°, so the other is" The answer is 23. Angles in a triangle and on a straight line add up to 180°. Angles round a point add up to 360°.
What should I learn before and after angles in triangles, on a line and round a point?
Before it, try area of rectangles, triangles and parallelograms (Grade 6). After it, move on to circles, circumference and area (Grade 7).
How can I get better at angles in triangles, on a line and round a point?
Angles in a triangle and on a straight line add up to 180°. Angles round a point add up to 360°. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
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