Attributes of Shapes — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
A square has 4 sides and 3 right angles.
Corrected: A square has 4 sides and 4 right angles.
The corrected sentence is: "A square has 4 sides and 4 right angles.". The original sentence "A square has 4 sides and 3 right angles." contained an error that needed to be fixed.
2. Fix the sentence:
A triangle is a quadrilateral because it has straight sides.
Corrected: A triangle is not a quadrilateral because it has 3 sides, not 4.
The corrected sentence is: "A triangle is not a quadrilateral because it has 3 sides, not 4.". The original sentence "A triangle is a quadrilateral because it has straight sides." contained an error that needed to be fixed.
3. Fix the sentence:
A hexagon has 5 sides and 5 angles.
Corrected: A hexagon has 6 sides and 6 angles.
The corrected sentence is: "A hexagon has 6 sides and 6 angles.". The original sentence "A hexagon has 5 sides and 5 angles." contained an error that needed to be fixed.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A shape with 4 equal sides and 4 right angles is a square.
A square has 4 equal sides and 4 right angles, making it both a rectangle and a rhombus.
2. A polygon with 5 sides is called a pentagon.
The prefix 'penta' means five, so a pentagon is a polygon with 5 sides.
3. A right angle looks like the corner of a square.
A right angle measures exactly 90 degrees, which looks like the corner of a square or a rectangle.
4. A rectangle has 4 right angles.
A rectangle always has 4 right angles, one at each corner.
Part C: True or False?
Read each statement. Circle True or False.
1. All rectangles have 4 right angles.
True False
A square is a rectangle because it has 4 right angles and opposite sides that are equal.
2. A triangle can have 4 sides.
True False
A triangle has 3 sides and 3 angles, not 4.
3. An octagon has 8 sides.
True False
The prefix 'hex' means six, so a hexagon is a polygon with 6 sides.