Shapes and angles
Grade 6 · Math
Explore numbers, spot patterns and explain how you worked it out.
Choose a game
Take your time, try a game and collect stars.
Missing angles
Angles in a triangle add up to 180°. Find missing angles in triangles, quadrilaterals and polygons in this
Play Missing anglesParts of a circle
Radius, diameter and circumference: match each part of a circle, and double the radius, in this
Play Parts of a circle
Learning about shapes and angles
These Grade 6 Math games practice Missing angles, Parts of a circle. Choose a game above for a short activity, or explore the examples below before you play. The full guide for each game explains its controls, gives more examples and includes a free printable for practice away from the screen.
Talk it through
Use counters, a drawing or a number line before moving to a mental method. Ask your child to explain a choice, then change one number and try the method again.
Ask: “How could you show the same answer another way?” Give your child time to explain. Return to an example after playing and ask whether they would approach it differently.
Missing angles
In this game children use these facts to find missing angles. Each question needs the right total, 180° for a triangle or 360° for a quadrilateral, and careful subtraction.
Try an example: A triangle has angles of 60° and 70°. What is the third angle?
180 − 60 − 70 = 50.
Show the answer
50°
What to look out for
Using 360° for a triangle. Tear the corners off a paper triangle and put them on a straight line: 180°.
Parts of a circle
In this game children match descriptions and measurements to the parts of a circle. Some cards give a radius and ask for the diameter, or the other way round, so children practice doubling and halving.
Try an example: a straight line from edge to edge through the center
It goes right across through the middle.
Show the answer
diameter
What to look out for
Mixing up radius and diameter. Remember the diameter goes all the way across, so it is the longer of the two.
Practice away from the screen
- Draw a triangle, measure two angles and predict the third before measuring it.
- Measure the radius and diameter of plates and lids.
Curriculum connections
Missing angles
Enrichment beyond Grade 6: angles in triangles and vertical angles are Common Core 7.G.B.5 and 8.G.A.5. It builds on additive angle measure in 4.MD.C.7.
Parts of a circle
Enrichment: radius, diameter and circumference are introduced in Common Core 7.G.B.4. This game only names the parts and links radius and diameter.
Questions families ask
Where should we start with shapes and angles?
Start with Missing angles. Look at the worked example together, then try a round. If the task feels unfamiliar, use the full game guide or its free printable before trying again.
Does this cover everything taught at this level?
No. These games provide focused practice. Grade suggestions do not replace your school’s curriculum, and any Common Core connection applies only to the skill described.