## Classify Two-dimensional Figures

#### 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

- Properties of Quadrilaterals
Step-by-step Lesson- Tell us all the properties that you know
for each shape.

- Guided Lesson -
We ask you to name a specific set of quadrilaterals and see if we
can prompt you in number two.

- Guided Lesson Explanation
- There are a number of ways to answer these problems. Some people
worry about sides, corners about corners.

- Practice Worksheet -
Name each two dimensional figure that we throw at you.

- Identify Quadrilaterals
Five Pack - You may have to draw a few too.

- Building Quadrilaterals
Five Pack- We want fixed unit shapes. You might want to use
a pencil with a good eraser for this one..

- Matching Worksheet
- A nice mixture of problem types for you here.

- The Quadrilateral Family Worksheet Five Pack - Word problems that lead you towards naming a quadrilateral of some kind.

#### 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.