Home > Grade Levels > Grade 5 >

Classify Two-dimensional Figures

Answer Keys Here

Aligned To Common Core Standard:

Grade 5 Geometry - 5.G.4

How to Classify Two-Dimensional Figures - Two-dimensional figures or shapes only have two measures of length (height and width) associated with them. We classify two-dimensional figures by looking for either parallel or perpendicular lines present within the figure. The prefix portion of the name of a shape indicates the number of sides of the figure. For example, a triangle has three sides and a quadrilateral has four sides. Quadrilaterals take on many different names based on the angles and lines structure of the figure. Squares are a dead giveaway because they contain four right angles and all their sides are equal. That differs from a rectangle that has two pairs of sides with equal length. Students will often confuse a rhombus with a trapezoid. A rhombus as two pairs of parallel sides and a trapezoid has only one pair of parallel sides. This will become much more common place for you as you gain experience working with these shapes.

Printable Worksheets And Lessons

Homework Sheets

Make sure that you pay attention to the measure. They are there for a reason.

  • Homework 1 - : A 4-sided flat shape with straight sides that has a pair of opposite sides parallel.
  • Homework 2 - Identify the shape.
  • Homework 3 - It has 10 points and 10 equal sides.

Practice Worksheets

Some more shape reminders here. A lot of teachers tell me that they will give students the answers to these and ask them what the question is.

  • Practice 1 - Identify and/or draw the Quadrilateral indicated.
  • Practice 2 - There will be more than four sides here.
  • Practice 3 - The sides that are parallel are called "bases". The other sides are "legs" (which may or may not be parallel).

Math Skill Quizzes

I totally got carried away with my true/false questions here.

  • Quiz 1 - Identify the statements (true/false). "The opposite sides of parallelogram are equal and parallel to each other."
  • Quiz 2 - The diagonals of parallelogram are equal in length.
  • Quiz 3 - The diagonals of square are parallel to the base.