Lesson 10 2 area 2012
- 1. Name ____________________________________ Date __________________ Mrs. Labuski & Mrs. Rooney Period _________ Lesson 10-2 Area VOCABULARY DEFINITION EXAMPLE The area of a figure is the amount of surface it covers. Answer is always There are 3 rows of 5 squares. written in units2 or 3 • 5 = 15 So, the area of the rectangle is 15 square units square units A = _lw_____ Area of rectangle A = length x width A = _ 7•9___ A = lw A = __63____ A = __63yd2__ A = ___bh___ Area of parallelogram A = base x height A = __8•3___ AREA A = bh A = __24____ A = __24 un2_ A = __½ bh _ Area of triangle A = __½•6•4 A = ½ base x height A = __3•4_ A = ½ bh A = __12un2 Area of trapezoid A=½(b1+b2)•h A= ½ (base1+base2)•height A=½(6+4)•3 A = (b1 + b2)•h A= ½(10)•3 2 A= 5•3 (or) A = ½(b1 + b2)•h A=15 in2 Find the area of each figure. Be sure to write the formula & plug in the numbers.
- 2. A = lw A = 8 x 12 A = 96 A = 96 mi2 A = bh A = 2.1 x 5 A = 10.5 A = 10.5 in2 A = ½ bh A = ½ x 4 x 3.5 A = 2 x 3.5 A = 7 ft2 A = ½ (b1 + b2)•h A = ½ (4 + 10) •8 A = ½(14) •8 A=7•8 A = 56 cm2 A section of a stained-glass window is shaped like a parallelogram. Its base is 6.5 inches, and its height is 4 inches. How much glass is needed to cover the section completely? A = bh A = 6.5 x 4 A = 26 in2 Your rectangular yard is 10 feet wide and 26 feet long. How many square feet of grass do you need to plant if you want to cover the entire yard? A = lw A = 10 x 26 A = 260 ft2 Name ____________________________________ Date __________________
- 3. Mrs. Labuski & Mrs. Rooney Period _________ Lesson 10-2 Area VOCABULARY DEFINITION EXAMPLE Area of rectangle A = ________ A = ________ A = ________ A = ________ Area of parallelogram A = ________ A = ________ AREA A = ________ A = ________ Area of triangle A = ________ A = ________ A = ________ A = ________ Area of trapezoid A = ________ A = ________ A = ________ A = ________ A = ________ Find the area of each figure. Be sure to write the formula & plug in the numbers.
- 4. A section of a stained-glass window is shaped like a parallelogram. Its base is 6.5 inches, and its height is 4 inches. How much glass is needed to cover the section completely? Your rectangular yard is 10 feet wide and 26 feet long. How many square feet of grass do you need to plant if you want to cover the entire yard?