Bake Sale

1
Bake Sale

• Cara, Nick, and Tammy had 96 cookies (8 dozen) to
  sell at a bake sale.
• Tammy sold 32 cookies.
• Nick sold as many cookies as Tammy sold plus 5
  more.
• Cara sold 10 fewer cookies than Tammy sold.
• How many cookies did they have left?

2
Bake Sale

• They had 5 cookies left.

3
Quadrilaterals

• Lesson 10-5
• Identify and Classify Quadrilaterals

4
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.

5
Quadrilateral
6
Parallelogram
Means parallel
Means congruent
A quadrilateral with opposite sides parallel and
opposite sides congruent.
7
Rectangle
A parallelogram with 4 right angles.
8
Rhombus
A parallelogram with 4 congruent sides.
9
Square
A parallelogram with 4 right angles and 4
congruent sides.
10
Trapezoid
A Quadrilateral with one pair of parallel sides.
11
Quadrilateral
Parallelogram
Rhombus
Trapezoid
Rectangle
Square
12
Measure of a Quadrilateral
B
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 180 180 360
• The sum of the measure of the angles of a
  quadrilateral is 360

13
Find the measure of the missing angle.

• 85 73 59
• 217
• 360 217
• x 143

73
59
85
x
14
Concept Check

• Explain why all squares are rectangles but not
  all rectangles are squares?

15
Concept Check

• A quadrilateral is a trapezoid.
• Always
• Sometimes
• Never

16
Concept Check

• A quadrilateral is a trapezoid.
• Always
• Sometimes
• Never

17
Concept Check

• A parallelogram is a rectangle.
• Always
• Sometimes
• Never

18
Concept Check

• A parallelogram is a rectangle.
• Always
• Sometimes
• Never

19
Concept Check

• A trapezoid is a parallelogram.
• Always
• Sometimes
• Never

20
Concept Check

• A trapezoid is a parallelogram.
• Always
• Sometimes
• Never

21
Practice Work

• Lesson 10-5 pg 435 - 436
• 4 24 all

22
Homework/Wrap-up

• Complete Lesson 10-5 1-15 all