1. Lesson 10-5 Identify and Classify Quadrilaterals

2. Quadrilateral A closed figure with four sides and four angles.
Quadrilaterals are named based on their sides and angles.
The diagram shows how the quadrilaterals are related.

3. Quadrilateral

4. Parallelogram
Means parallel
Means congruent
A quadrilateral with opposite sides parallel and opposite sides congruent.

5. Rectangle
A parallelogram with 4 right angles.

6. Rhombus
A parallelogram with 4 congruent sides.

7. Square
A parallelogram with 4 right angles and 4 congruent sides.

8. Trapezoid
A Quadrilateral with one pair of parallel sides.

9. Quadrilateral
Parallelogram
Rhombus
Trapezoid
Rectangle
Square

10. Measure of a QuadrilateralB A
A Quadrilateral can be separated into 2 triangles. Since the sum of the measure of each triangle is 180° then the sum of the measure of both triangles is = 360°
The sum of the measure of the angles of a quadrilateral is 360°

11. Find the measure of the missing angle.=
217
360 – 217 =
x = 143°
73°
59°
85° x°

12. Concept Check
Explain why all squares are rectangles but not all rectangles are squares?

13. Concept Check
A quadrilateral is a trapezoid.
Always
Sometimes
Never

14. Concept Check
A quadrilateral is a trapezoid.
Always
Sometimes
Never

15. Concept Check
A parallelogram is a rectangle.
Always
Sometimes
Never

16. Concept Check
A parallelogram is a rectangle.
Always
Sometimes
Never

17. Concept Check
A trapezoid is a parallelogram.
Always
Sometimes
Never

18. Concept Check
A trapezoid is a parallelogram.
Always
Sometimes
Never

19. Practice Work Classwork - Old Blue p. 435 - 437 (4-25, 28-37, 39-50)
IXL Lesson P8
Homework - Practice worksheets