Perimeter & Area 6.3.1.2 Calculate the area of quadrilaterals. Quadrilaterals include spares, rectangles, rhombuses, parallelograms, trapezoids and kites. When formulas are used, by able to explain why they are valid.

I can… Use formulas to calculate the perimeter of rectangles and squares Use formulas to calculate the area of rectangles and squares Use formulas to calculate the perimeter and area of composite shapes made of rectangles and squares Self Assessment 5- I can do it without help & teach others. 4- I can do this with no help, but I don’t know if I can explain it. 3- I can do this with a little help. 2- I can do this with a lot of help! 1- I don’t have a clue.

Perimeter distance around a shape length width width Perimeter of a RECTANGLE Pr = 2(length) + 2(width) Pr = 2l + 2w This is the same as adding up all of the sides! P = l+l+w+w length

Perimeter Find the Perimeter…. Remember: You MUST write the Formula Pr = 2(length) + 2(width) Pr = 2(9) + 2(5) Pr = 18 + 10 Pr = 28 m 9m 5m 5m 9m Don’t forget your label

Don’t forget your label Draw a picture and write down the formula Your Turn… Find the Perimeter of a rectangle with a length of 20 in and a width of 12 in Pr = 2(length) + 2(width) Pr = 2(20) + 2(12) Pr = 40 + 24 Pr = 64 in 20 in 12 in 12 in 20 in Don’t forget your label

AREA the amount of surface the figure covered, measured in square units Area of a RECTANGLE Ar = length • width Ar = l • w width length

Don’t forget your label ARea Find the ARea…. Remember: You MUST write the Formula Ar = l • w Ar = 9 • 5 Ar = 45 in2 9in 5in 5in 9in Don’t forget your label

Don’t forget your label Draw a picture and write down the formula Your Turn… Find the Area of a rectangle with a length of 200 cm and a width of 100 cm Ar = l • w Ar = 200 • 100 Ar = 20,000 cm2 100 cm 200 cm Don’t forget your label

Perimeter distance around a shape Side 3 Side 4 Side 2 Perimeter of a SQUARE Ps = 4(side) Ps = 4s This is the same as adding up all of the sides! P = l+l+w+w Side 1

Perimeter Find the Perimeter…. Remember: You MUST write the Formula Ps = 4(side) Ps = 4(60) Ps = 240 ft 60 ft 60 ft Don’t forget your label

Don’t forget your label Draw a picture and write down the formula Your Turn… Find the Perimeter of a rectangle with a length of 12 in and a width of 12 in Ps = 4(side) Ps = 4(12) Ps = 48 ft 12 ft 12 ft Don’t forget your label

AREA the amount of surface the figure covered, measured in square units Area of a SQUARE As = side • side As = s2 side side

Don’t forget your label ARea Find the ARea…. Remember: You MUST write the Formula As = s2 As = 602 As = (60)(60) As = 3,600 ft2 60 ft 60 ft Don’t forget your label

Don’t forget your label Draw a picture and write down the formula Your turn Find the Area of a rectangle with a length of 11 cm and a width of 11 cm As = s2 As = 112 As = (11)(11) As = 121 ft2 11 cm 11 cm Don’t forget your label

Unknown dimensions write, substitute, and solve an equation Draw a picture and write down the formula Its area is 195 m2 and its length is 15 m. What is the width? Ar = length • width 195 = 15• w 15 15 w = 13 m w 15 m

AREA of Composite Shapes Divide the shape into rectangles or squares Find the area of each new shape Add areas Ap = 3•2 Ap = 6 ft2 Ao = 3•5 Ao = 15 ft2 3 ft At= 6 + 15 = 21 ft2

I can… Use formulas to calculate the perimeter of rectangles and squares Use formulas to calculate the area of rectangles and squares Use formulas to calculate the perimeter and area of composite shapes made of rectangles and squares Self Assessment 5- I can do it without help & teach others. 4- I can do this with no help, but I don’t know if I can explain it. 3- I can do this with a little help. 2- I can do this with a lot of help! 1- I don’t have a clue.

in your math notebook Daily Check 2.2 Find the Perimeter and Area of each. A room that is 15 feet by 15 feet A rectangle that is 34 meters by 21 meters Tell whether to use perimeter or area to decide how much to buy. Tiles to cover a floor Foam strip to insulate window Find the missing length. Area of a rectangle = 54 in2, width = 9 in., length = ? Perimeter of a rectangle = 80 cm, width = 15cm, length = ?