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:
An octagon has 6 sides and 6 angles.
Corrected: An octagon has 8 sides and 8 angles.
The corrected sentence is: "An octagon has 8 sides and 8 angles.". The original sentence "An octagon has 6 sides and 6 angles." contained an error that needed to be fixed.
2. Fix the sentence:
A rhombus has 4 right angles just like a square.
Corrected: A rhombus has 4 equal sides but does not always have right angles.
The corrected sentence is: "A rhombus has 4 equal sides but does not always have right angles.". The original sentence "A rhombus has 4 right angles just like a square." contained an error that needed to be fixed.
3. Fix the sentence:
A pentagon has 4 sides and 4 angles.
Corrected: A pentagon has 5 sides and 5 angles.
The corrected sentence is: "A pentagon has 5 sides and 5 angles.". The original sentence "A pentagon has 4 sides and 4 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 polygon with 8 sides is called an octagon.
The prefix 'octa' means eight, so an octagon is a polygon with 8 sides.
2. A quadrilateral with only one pair of parallel sides is a trapezoid.
A trapezoid is defined as a quadrilateral with exactly one pair of parallel sides.
3. The number of angles in a polygon equals the number of sides.
In any polygon, the number of angles always equals the number of sides.
4. A shape with 3 sides and 3 angles is a triangle.
A triangle is a polygon with exactly 3 sides and 3 angles.
Part C: True or False?
Read each statement. Circle True or False.
1. A square is also a rectangle.
True False
A quadrilateral is any shape with 4 sides. Since a square has 4 sides, it is a quadrilateral.
2. Every quadrilateral has exactly 4 sides.
True False
A rhombus is a quadrilateral with all four sides equal in length.
3. A circle is a polygon.
True False
A circle is not a polygon because it has no straight sides or angles.