SME
Grade 2 Math · Geometry
Shapes, their attributes and equal shares
Use this for “The circle has 3 equal parts. 1 is shaded. How many parts are not shaded?”
Picture
Circle
Rectangle
3 equal parts (thirds): 1 shaded, 2 not shaded.
1 third shaded.
Tap a part to shade it.
Not shaded: 2
This is an example. Choose the numbers from your problem to start.
Equal parts
example
Shaded parts
example
Not shaded
answer
Number sentences
1 of 3 equal parts shaded, 2 not shaded
Good to know
•
Equal parts are the same size. 3 equal parts are thirds.
•
Equal parts can have different shapes but the same size.
•
Three thirds make one whole.
Step-by-step
WE KNOW
Equal parts: 3
Shaded parts: 1
FIND
not shaded
Step 1 · Find not shaded
1 of 3 equal parts shaded, ? not shaded
Take the shaded parts away from all the parts.
3 − 1
Not shaded: 2 (1 third is shaded, 2 thirds are not: 3 thirds make the whole)
Check
Put the numbers back in. Both sides should match.
1 of 3 equal parts shaded, 2 not shaded ✓
Topic check
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More problem types
Partition rectangles into equal squares
Use this for “Split a rectangle into 3 rows of 4 equal squares. How many squares?”
Faces, edges and vertices of solids
Use this for “A prism has how many faces, edges and vertices?”
Describe two-dimensional shapes
Use this to sort shapes by their number of sides: triangle, quadrilateral, pentagon or hexagon.
Equal shares, different shapes
Use this to tell which cuts make halves and which do not.