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area

  1. math_celebrity

    If the perimeter of square C is triple the perimeter of square D, the area of square C is how many t

    If the perimeter of square C is triple the perimeter of square D, the area of square C is how many times the area of square D? A. 1/3 B. 1 C. 3 D. 9 E. 27 Let side of D be s. Perimeter is 4s. Area is (4s)^2 = 16s^2 Let side of C be 3s. Perimeter is 4(3s) = 12s. Area is (12s)^2 = 144s^2...
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    Find the area of a rectangle with length 8 cm and width 5 cm.

    Find the area of a rectangle with length 8 cm and width 5 cm. A = l x w A = 8cm * 5cm A = 40cm^2 Also, you can use this calculation:
  3. math_celebrity

    A rectangle is cut in half to create two squares that each has an area of 25. What is the perimeter

    A rectangle is cut in half to create two squares that each has an area of 25. What is the perimeter of the original rectangle? A. 20 B. 25 C. 30 D. 50 Area of a square: A = s^2 We're given A = 25: s^2= 25 s = 5 This means the rectangle width is 5. The rectangle length is 2(5) = 10...
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    Anna painted 1/6 of a wall, Eric painted 1/5 of the wall, and Meadow painted 1/4 of the wall. There

    Anna painted 1/6 of a wall, Eric painted 1/5 of the wall, and Meadow painted 1/4 of the wall. There are now 3910 square feet left to paint. How many square feet did Anna paint? Using 60 as a common denominator through least common multiple, we get: 1/6 = 10/60 1/5 = 12/60 1/4 = 15/60 10/60 +...
  5. math_celebrity

    When a circle's radius triples, what happens to its area?

    When a circle's radius triples, what happens to its area? A = πr^2 When r = 3r, then we have: a = π(3r)^2 A = 9(πr^2) This means Area increases by 9x
  6. math_celebrity

    A triangle has an area of 60 square inches and a base of 10 inches. What is its height?

    A triangle has an area of 60 square inches and a base of 10 inches. What is its height? A = bh/2 b = 2A/h b = 2(60)/10 b = 120/10 b = 12 inches
  7. math_celebrity

    How many square feet are in a square yard?

    How many square feet are in a square yard? A square yard = 1 yard * 1 yard Since 1 yard = 3 feet, we have: A square yard = 3 feet * 3 feet = 9 feet
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    What is the formula for the area of a circle?

    What is the formula for the area of a circle? Given a radius r, we have Area (A) of: A = πr^2
  9. math_celebrity

    How many inches are in a square foot?

    How many inches are in a square foot? Square area is s * s where s = 12 inches per foot Area = 12 inches per foot * 12 inches per foot Area = 144 square inches
  10. math_celebrity

    What is the ratio of the area of a circle to the area of a square drawn around that circle? Express

    What is the ratio of the area of a circle to the area of a square drawn around that circle? Express your answer in terms of pi. Area of a circle = pir^2 area of a square = (2r)^2 = 4r^2 Ratio = pir^2/4r^2 Ratio = pi/4
  11. math_celebrity

    Laura found a roll of fencing in her garage. She couldn't decide whether to fence in a square garden

    Laura found a roll of fencing in her garage. She couldn't decide whether to fence in a square garden or a round garden with the fencing. Laura did some calculations and found that a circular garden would give her 1380 more square feet than a square garden. How many feet of fencing were in the...
  12. math_celebrity

    When the side of a square is doubled in length, its area increases by 432 square inches. What is the

    When the side of a square is doubled in length, its area increases by 432 square inches. What is the size of the original square? Original square side length is s Area = s^2 Double the side lengths to 2s New area = (2s)^2 = 4s^2 Setup the difference relation: 4s^2 - s^2 = 432 3s^2 = 432...
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    A dog on a 20-foot long leash is tied to the middle of a fence that is 100 feet long. The dog ruined

    A dog on a 20-foot long leash is tied to the middle of a fence that is 100 feet long. The dog ruined the grass wherever it could reach. What is the area of the grass that the dog ruined. The leash forms a circle where the dog can get to. A = pi(r)^2 A = 3.1415(20)^2 A = 3.1415 * 400 A = 1256...
  14. math_celebrity

    Keith is cutting two circular table tops out of a piece of plywood. the plywood is 4 feet by 8 feet

    Keith is cutting two circular table tops out of a piece of plywood. the plywood is 4 feet by 8 feet and each table top has a diameter of 4 feet. If the price of a piece of plywood is $40, what is the value of the plywood that is wasted after the table tops are cut? Area of the plywood = 4 * 8 =...
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    Kamara has a square fence kennel area for her dogs in the backyard. The area of the kennel is 64 ft

    Kamara has a square fence kennel area for her dogs in the backyard. The area of the kennel is 64 ft squared. What are the dimensions of the kennel? How many feet of fencing did she use? Explain. Area of a square with side length (s) is: A = s^2 Given A = 64, we have: s^2 = 64 Typing this...
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    area of a rectangle

    area of a rectangle Let l be the length and w be the width of a rectangle. The Area (A) is: A = lw
  17. math_celebrity

    Anne wants to make a platform that is 7 feet wide and 10 feet long. If she uses boards that measure

    Anne wants to make a platform that is 7 feet wide and 10 feet long. If she uses boards that measure 6 inches wide by 2 feet long, how many boards will she need to complete the job? Area of platform which is a rectangle: A = lw A = 10 * 7 A = 70 Area of boards which are rectangles: A = lw A = 2...
  18. math_celebrity

    A triangular garden has base of 6 meters amd height of 8 meters. Find its area

    A triangular garden has base of 6 meters amd height of 8 meters. Find its area Area (A) of a triangle is: A = bh/2 Plugging in our numbers, we get: A = 6*8/2 A = 24 square meters
  19. math_celebrity

    A rectangular hotel room is 4 yards by 5 yards. The owner of the hotel wants to recarpet the room wi

    A rectangular hotel room is 4 yards by 5 yards. The owner of the hotel wants to recarpet the room with carpet that costs $76.00 per square yard. How much will it cost to recarpet the room? $ The area of a rectangle is length * width, so we have: A = 5 yards * 4 yards A = 20 square yards Total...
  20. math_celebrity

    a rectangle has a length of x-7 and a width of x + 5. Write an expression that represents the area o

    a rectangle has a length of x-7 and a width of x + 5. Write an expression that represents the area of the rectangle in terms of x. Area of a rectangle (A) with length(l) and width (w) is expressed as follows: A = lw Plugging in our values given above, we have: A = (x - 7)(x + 5)
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