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- 2D Shapes and Planes

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Try reviewing these fundamentals first

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Get Started Now- Intro Lesson: a11:02
- Intro Lesson: b3:44
- Intro Lesson: c7:08
- Intro Lesson: d3:13
- Intro Lesson: e3:29
- Intro Lesson: f8:37
- Lesson: 1a2:00
- Lesson: 1b1:57
- Lesson: 1c1:11
- Lesson: 1d1:23
- Lesson: 1e1:09
- Lesson: 1f2:16
- Lesson: 2a1:33
- Lesson: 2b4:44
- Lesson: 2c4:10
- Lesson: 2d3:43
- Lesson: 2e2:50
- Lesson: 2f5:47
- Lesson: 3a3:45
- Lesson: 3b5:55
- Lesson: 3c5:23
- Lesson: 3d6:10
- Lesson: 4a2:57
- Lesson: 4b2:57
- Lesson: 4c2:16
- Lesson: 4d2:55
- Lesson: 4e3:09

In this lesson, we will learn:

- A quadrilateral is a polygon with 4 sides
- We can look at the properties of a quadrilateral (pairs of parallel sides, pairs of congruent sides, types of angles) to classify into 6 different types
- The special types of quadrilaterals are: rectangle, square, parallelogram, rhombus, trapezoid, and kite

- A
**quadrilateral**is a**2D shape**with 4 straight sides (a 4-sided**polygon**) - A quadrilateral also has 4
**vertices**(corners) - Each corner contains an
**angle**; the total angle sum in any quadrilateral is 360° - There are special quadrilaterals with specific definitions and names
- There will be 6 types of quadrilaterals in this lesson:
**Rectangle, Square, Parallelogram, Rhombus, Trapezoid**, and**Kite** - A
**quadrilateral**can fit the definition of__more than one__of these special types **Rectangles**and**squares:**- Quadrilaterals with
__4 right angles__(all angles are 90° ) - A
**rectangle**has 2 pairs of**opposite**and**equal**sides (**congruent**) - A
**square**is a special type of rectangle where__all 4 sides are equal__(**congruent**) - All squares are rectangles, but
__not__all rectangles are squares - Rectangles and squares can also be considered as
**parallelograms**, just with right angles **Parallelograms**and**rhombuses:**- Quadrilaterals with
__2 pairs of parallel sides__and__2 pairs of opposite equal angles__ - A
**parallelogram**has 2 pairs of**congruent**sides (equal length) - A
**rhombus**has all 4 sides**congruent**(all 4 sides equal length) - All rhombuses are parallelograms;
__not__all parallelograms are rhombuses **Trapezoids:**- Quadrilaterals with
__only 1 pair of parallel sides__ **Kites:**- Quadrilaterals with
__2__(no parallel sides)**adjacent**congruent sides - There is
__1 pair of opposite equal angles__across the line of symmetry - Summary of quadrilateral types and properties (sides and angles):

- IntroductionIntroduction to Classifying Quadrilaterals:a)What is a quadrilateral and what geometry concepts are we going to use to classify different types?b)Classifying rectangles and squaresc)Classifying parallelograms and rhombusesd)Classifying trapezoidse)Classifying kitesf)A review on the 6 different classifications of quadrilaterals
- 1.
**Naming quadrilateral shapes**

Classify the quadrilateral. Think about its sides and angles.a)b)c)d)e)f) - 2.
**Classifying quadrilateral types**

Answer with the letter on each quadrilateral shapea)Which shapes are quadrilaterals?b)Which shapes are parallelograms?c)Which shapes are rectangles?d)Which shapes have all 4 sides congruent?e)Which shapes do not have right angles?f)Which shapes have exactly 2 pairs of congruent sides? - 3.
**Angles of quadrilaterals**

Find the missing angle(s) and classify the quadrilateral.a)b)c)d) - 4.
**Classifying quadrilaterals - word problems**

Read the description and answer with the correct quadrilateral.a)I have 2 pairs of parallel & congruent sides. If I do not have right angles, what am I?b)I have 4 congruent sides and these sides make up 2 pairs of parallel sides. If I only have right angles, what am I?c)I have a total angle sum of 360° and only 1 pair of parallel sides. What am I?d)I am to a parallelogram what a square is to a rectangle. What am I?e)I have 2 pairs of adjacent congruent sides and 1 pair of equal opposite angles. What am I?