2D Shapes & Properties — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A triangle has 3 corners.
A triangle has 3 corners because each of its 3 sides meets at a point.
2. A hexagon has 6 sides.
The word "hex" means six, so a hexagon always has 6 sides.
3. A shape with 0 sides is a circle.
A circle is the only basic shape with no straight sides; it is all curves.
4. A rectangle has 4 sides.
A rectangle has 2 long sides and 2 short sides, which makes 4 sides in all.
5. A square has 4 equal sides.
All 4 sides of a square are the same length, so they are equal.
6. An oval has 0 corners.
An oval is smooth and curved all around, so it has no corners.
7. A circle is round all around.
A circle curves the same amount in every direction, which is why it is round.
8. A hexagon has 6 corners.
A hexagon has 6 sides, and where each pair of sides meets there is a corner, so it has 6 corners.
9. A triangle has 3 sides.
Count the straight lines on a triangle: there are 3 sides.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
circle
→ 0 corners
0 corners
triangle
→ 3 sides
3 sides
square
→ 4 equal sides
4 equal sides
hexagon
→ 6 sides
6 sides
A circle has 0 corners because it is round. A triangle has 3 sides. A square has 4 equal sides. A hexagon has 6 sides because "hex" means six.