Attributes of Shapes — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A parallelogram has 2 pairs of parallel sides.
A parallelogram has 2 pairs of parallel sides; opposite sides are parallel to each other.
2. A square has 4 equal sides and 4 right angles.
A square has 4 right angles, each measuring exactly 90 degrees.
3. A shape that has 4 equal sides but not all right angles is a rhombus.
A rhombus has 4 equal sides, but its angles are not necessarily right angles.
4. A rectangle has 2 pairs of sides that are the same length.
In a rectangle, opposite sides are equal in length.
5. A polygon with 7 sides is called a heptagon.
The prefix 'hepta' means seven, so a heptagon is a polygon with 7 sides.
6. A trapezoid has exactly 1 pair of parallel sides.
A trapezoid is defined as having exactly one pair of parallel sides.
7. All squares are rectangles, but not all rectangles are squares.
A square meets all the requirements of a rectangle (4 right angles, opposite sides equal), but a rectangle does not always have 4 equal sides like a square.
8. A line of symmetry divides a shape into two equal halves.
A line of symmetry splits a shape into two halves that are mirror images of each other.
9. A right angle measures exactly 90 degrees.
A right angle is defined as an angle that measures exactly 90 degrees.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Square
→ 4 equal sides and 4 right angles
4 equal sides, not always right angles
Trapezoid
→ 1 pair of parallel sides
4 right angles, opposite sides equal
Rectangle
→ 4 right angles, opposite sides equal
4 equal sides and 4 right angles
Rhombus
→ 4 equal sides, not always right angles
1 pair of parallel sides
A square has 4 equal sides and 4 right angles. A trapezoid has exactly 1 pair of parallel sides. A rectangle has 4 right angles with opposite sides equal. A rhombus has 4 equal sides but its angles are not always right angles.