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Example 5-3b Objective Identify and classify quadrilaterals

Example 5-3b Vocabulary Quadrilateral A closed figure having four sides and four angles

Example 5-3b Vocabulary Parallelogram A quadrilateral with opposite sides parallel and opposite sides congruent

Example 5-3b Vocabulary Trapezoid A quadrilateral with one pair of parallel sides

Example 5-3b Vocabulary Rhombus A parallelogram having four congruent sides

Example 5-3b Vocabulary Parallel Lines that do not intersect Always the same distance between the two lines

Lesson 5 Contents Example 1Classify Quadrilaterals Example 2Classify Quadrilaterals Example 3Find a Missing Measure

Example 5-1a Classify the quadrilateral using the name that best describes it. Rectangle The quadrilateral has 4 right angles Opposite sides are congruent 1/3 Meets the definition of a rectangle Answer:

Example 5-1b Classify the quadrilateral using the name that best describes it. Answer: parallelogram 1/3

Example 5-2a Classify the quadrilateral using the name that best describes it. Answer: Trapezoid The quadrilateral has one pair of parallel sides 2/3 No congruency symbols No right angles Meets the definition of a trapezoid

Example 5-2b Classify the quadrilateral using the name that best describes it. Answer: Square 2/3

Example 5-3a Find the missing angle measure in the quadrilateral. Sum of the angles in a quadrilateral is x = /3 Add the 4 angles together

Example 5-3a Find the missing angle measure in the quadrilateral. x = /3 Bring down x Combine “like” terms x Bring down = = Ask “what is being done to the variable?” The variable is being added by Do the inverse on both sides of the equal sign Bring down x x Subtract

Example 5-3a Find the missing angle measure in the quadrilateral. x = /3 x = Bring down = x Subtract = Bring down x x Combine “like” terms Bring down = = Combine “like” terms Use the Identify Property to add x x = Answer:

Example 5-3b Find the missing angle measure in the quadrilateral. Answer: x = 134  * 3/3

End of Lesson 5 Assignment Lesson 10:5Quadrilaterals All