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Geometry March 10 & 11

Geometry March 10 & 11. College Readiness Standards: Compute the area of rectangles when whole number dimensions are given Find area and perimeter of a variety of polygons by substituting given values into standard geometric formulas. Objectives.

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Geometry March 10 & 11

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  1. GeometryMarch 10 & 11 College Readiness Standards: Compute the area of rectangles when whole number dimensions are given Find area and perimeter of a variety of polygons by substituting given values into standard geometric formulas

  2. Objectives • All students will be able to find the perimeter of a polygon. • Most students will be able to find the perimeter and area of polygon. • Some students will be able to derive the formulas for polygons from a square to understand the formulas for area and perimeter of polygons.

  3. Agenda • Paper Distribution/ Announcements5min • Bell ringer 10 min • Notes on Polygons (area and perimeter) 20min (6AB 10min) • Independent Practice 30min (20min) • Clean Up 5min

  4. Bell Ringer 10min • Fran earns $64 on Monday, $56.45 on Tuesday, and $72.38 on Wednesday. She spends one-third of her earnings. How much does she have left? • Five basketballs and two nets are purchased for a school. The basketballs cost $12.75each and the nets cost $50 each. The school receives a 25% discount from the prices. Which of following equals the cost of this equipment?

  5. Recap application of ratios • Measurement of similar figures • Drawing on whiteboard • Triangle ABC is similar to Triangle XYZ • Segment AB = 6, Segment XY = 2 • What is the measure of BC? If the measure of Segment YZ = 3?

  6. Introduction to Polygons Squares, Triangles, Parallelograms

  7. Squares, Triangles, Parallelograms • What do we know about a square? • What do we know about a triangle? • What do we know about a parallelogram? • What is the difference between a square and triangle? • What is the difference between a parallelogram and a triangle? • What is the difference between a square and parallelogram?

  8. Parallelogram/Square = l x w • Find the perimeter and area if one side is equal to 5. • Find the perimeter and area if one side is equal to x. • Find the perimeter and area if one side is equal to x + 2. • If the perimeter is 28 and the area is 49. What is the length of a side?

  9. Triangles • What is area of a triangle with a base of 5 and a height of 6? • What is the area of a triangle with a base of 3 and a height of 1.5? • If the area of a triangle is 24 with a base of 6. What is the height?

  10. Independent Practice • Finish Mean, Median, Mode • Finish Ratio and Proportions • Extra credit assignment due tomorrow • Tomorrow’s topic algebraic expressions

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