Assignment in Math -.- Perimeter is the distance around a two-dimensional shape.Example #1 What is the perimeter of a square with side = 5 cm? So the perimeter of the square = 5 + 5 + 5 + 5 = 20 cm, or = 4 x 5 = 20 cmExample #2 Calculate the perimeter of a rectangular field with dimensions 75 m x20 m.Perimeter = 2(l + b) = 2(75 + 20) = 2 x 95 = 190 Example #3 The perimeter of a regular pentagon is 3+3+3+3+3 = 5×3 = 15 Area the extent or measurement of a surface or piece of land. Example #1 What is the area of a square with side length of 5 inches? The formula for finding the area of a square is A = s^2 The sides of this particular square are 5 inches, plug that into the formula to get A = 5^2 = 25 in^2 Example#2 Find the area of a square flower-bed of side 4.5 m. Solution: A=s2 = 4.5 =20.25 So, the area is 20.25 m2. Example#3 Find the area of a rectangular field 40 m long and 30 m wide. A=lw =40x30 =1200 So the area is 1200 m2 Volume amount of 3-dimensional space an object occupies. Example #1 Given a cube where the length of each side (edge) is 3cm. Find the volume of this cube. V=a3 =3^3 =3x3x3 = 27 cm3 Example #2 Given a rectangular solid with the width 2ft, length 3ft, and height 5ft. Find its volume. v = wlh = 2x3x5 = 30 ft3 Example #3 Given a pyramid with the width 3ft, length 4ft and height 5ft. Find its volume. V= 1/3 wlh =1/3 (3) (4) (5) =20 ft3 Capacity the maximum amount that something can contain. Example #1 Find the capacity of a cylinder with base radius of 5 units and height 7 units. Base radius = 5 and Height = 7 Capacity of the cylinder = Its volume = πr2h = π × 52 × 7 = 549.8 cubic units. Example #2 Express 4 L in mL. Solution: 1L= 1000 mL 4L= 4 X 1000 mL = 4000 mL Example #3 A reservoir can hold 49 760 megalitres of water. What is its capacity in liters? 1 ML = 1000 00
Posted on: Sun, 31 Aug 2014 05:28:49 +0000
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