1.7 Perimeter, Area, & Circumference HMWK: pp. 55 – 57, #s 15 – 29 odd, 40 – 46 even Game Plan: Today I will be able to … Calculate area, perimeter, & circumference Apply problem-solving plan Warm-up: State the area, perimeter, & circumference formulas for the figures. Just list the ones you remember. 1.Square 2.Rectangle 3.Triangle 4.Circle

1.7 Perimeter, Area, & Circumference Today 1.Check homework 2.Perimeter, area, & circumference 3.Examples 4.Wrap-Up 5.If-time … more constructions

1.7 Perimeter, Area, & Circumference Formulas Perimeter … Only polygons Distance around Add up all sides Area … Distance inside figure Units 2 Circumference … Only circles Distance around

1.7 Perimeter, Area, & Circumference Formulas Square A = s 2 P = 4s Rectangle A = lw P = 2l + 2w Triangle A = ½ bh P = a + b + c Circles A=  r 2 C = 2  r Always check your labels!!!!

1.7 Perimeter, Area, & Circumference Problem Solving Plan Same as it was in Algebra Steps to consider when solving 1.Verbal Model Draw a sketch of what you know 2.Labels Knowns & unknowns 3.Reasoning Solve & Check

1.7 Perimeter, Area, & Circumference Example A window has the shape of a rectangle with a half-circle. The rectangle has a width of 3 feet and a height of 7 feet. Find the perimeter and area of the window. P=21.71 ftA=24.53 ft sq

1.7 Perimeter, Area, & Circumference Wrap-Up 1.Why can’t we calculate the perimeter of a circle? 2.What is the difference between the perimeter and area of a polygon? Tomorrow … 1.Quiz –Ruler, compass, protractor, calculator, formula sheet 2.Finish presentations