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?

They had 5 cookies left. Bake Sale

Quadrilaterals Lesson 10-5 Identify and Classify Quadrilaterals

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.

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

Rectangle A parallelogram with 4 right angles.

Rhombus A parallelogram with 4 congruent sides.

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

Trapezoid A Quadrilateral with one pair of parallel sides.

Quadrilateral Parallelogram Rhombus Rectangle Square Trapezoid

Measure of a Quadrilateral A B 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°

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

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

Concept Check A quadrilateral is a trapezoid. Always Sometimes Never

Concept Check A quadrilateral is a trapezoid. Always Sometimes Never

Concept Check A parallelogram is a rectangle. Always Sometimes Never

Concept Check A parallelogram is a rectangle. Always Sometimes Never

Concept Check A trapezoid is a parallelogram. Always Sometimes Never

Concept Check A trapezoid is a parallelogram. Always Sometimes Never

Practice Work Lesson 10-5 pg # 4 – 24 all

Homework/Wrap-up Complete Lesson 10-5 # 1-15 all