The area of rectangle is : 13832.797999999999
These are the key stages:
1) Write an equation that defines the perimeter on the basis of length and width. (The perimeter is the sum of the four sides.) Replace the known perimeter.
2) Write an equation that defines the diagonal, once again based on the length and width. (Use the Pythagorean Theorem for this.) Replace the known diagonal.
3) Solve the two equations simultaneously. For example, you might solve the first equation for length, and replace this in the second equation. This will give you length and width.
4) Multiply length and width to get the area.
Change the perimeter into cm which is 93.24 cm and let its length be x with its width being y thus it followa that:- 1 Perimeter: 2x+2y = 93.24 => y = 46.62-x 2 Area: xy = 532.2672 => x(46.62-x) = 532.2672 3 And so area: 46.62x-x^2-532.2672 = 0 4 Using the quadratic equation formula: x = 26.64 and y = 19.98 5 Using Pythagoras' theorem: diagonal = 33.3 cm or 333 mm
1 Let the sides be 8x and 15x 2 So: 8x*15x = 367.5 or 120x2 = 367.5 3 Divide both sides by 120 and then square root both sides 4 Therefore: x = 1.75 so sides are 8*1.75 = 14 cm and 15*1.75 = 26.25 cm 5 Check: 14*26.25 = 367.5 square cm 6 Using Pythagoras: 142+26.252 = 885.0625 and its square root is 29.75 7 Diagonal = 29.75 cm 8 Perimeter = (2*14)+(2*26.25) = 80.5 cm
1 13.5 mm = 1.35 cm and 2187 sq mm = 21.87 sq cm2 Let the height be x+1.35 and the width be x3 (x+1.35)*x = 21.874 x2+1.35x-21.87 = 05 Solving the quadratic equation gives x a positive value of 4.056 Therefore: width = 4.05 cm and height = 5.4 cm7 Using Pythagoras: diagonal = 6.75 cm8 Check: 4.05*5.4 = 21.87 square cm = 2187 square mm
1 Let the sides be: x+4.75 and x2 If: 0.5*(x+4.75)*x = 135.3753 Then: x2+4.75x-270.75 = 04 Using the quadratic equation formula: x has a positive value of 14.255 Therefore: sides are 14.25+4.75 = 19 cm and 14.25 cm6 Using Pythagoras: 192+14.252 = 564.0625 and its square root is 23.757 Hypotenuse: 23.75 cm8 Perimeter: 23.75+19+14.25 = 57 cm9 Check: 0.5*19*14.25 = 135.375 square cm
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Change the perimeter into cm which is 93.24 cm and let its length be x with its width being y thus it followa that:- 1 Perimeter: 2x+2y = 93.24 => y = 46.62-x 2 Area: xy = 532.2672 => x(46.62-x) = 532.2672 3 And so area: 46.62x-x^2-532.2672 = 0 4 Using the quadratic equation formula: x = 26.64 and y = 19.98 5 Using Pythagoras' theorem: diagonal = 33.3 cm or 333 mm
1 Let the sides be 8x and 15x 2 So: 8x*15x = 367.5 or 120x2 = 367.5 3 Divide both sides by 120 and then square root both sides 4 Therefore: x = 1.75 so sides are 8*1.75 = 14 cm and 15*1.75 = 26.25 cm 5 Check: 14*26.25 = 367.5 square cm 6 Using Pythagoras: 142+26.252 = 885.0625 and its square root is 29.75 7 Diagonal = 29.75 cm 8 Perimeter = (2*14)+(2*26.25) = 80.5 cm
Another Answer:-Let the dimensions of the rectangle be x and y which are squared and square the diagonal and the area:-Using Pythagoras: x+y = 308.0025 => y = 308.0025-xArea: xy = 11957.4225 => x(308.0025 -x) = 11957.4225So it follows: 308.0025x -xsquared -11957.4225 = 0Solving the quadratic equation: x = 262.44 or x = 45.5625Square root of both number: x = 16.2 and x = 6.75By substitution: x = 16.2 and y = 6.75Perimeter: 2(16.2+6.75) = 45.9 cmCheck: 16.2*6.75 = 109.35 square cm
Suppose the length and breadth of the rectangle are L and B cm respectively, and the diagonal is D cm. Then, by Pythagoras, D2 = L2 + B2 So that 46.752 = (B + 19.25)2 + B2 = B2 + 38.5*B + 19.252 + B2 2B2 + 38.5*B - 1815 = 0 So B = 22 or -41.25 cm Since B cannot be negative, B = 22 cm. And therefore, the area is L*B = (22 + 19.25)*22 cm2 = 907.5 cm2
1 13.5 mm = 1.35 cm and 2187 sq mm = 21.87 sq cm2 Let the height be x+1.35 and the width be x3 (x+1.35)*x = 21.874 x2+1.35x-21.87 = 05 Solving the quadratic equation gives x a positive value of 4.056 Therefore: width = 4.05 cm and height = 5.4 cm7 Using Pythagoras: diagonal = 6.75 cm8 Check: 4.05*5.4 = 21.87 square cm = 2187 square mm
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1 Let its height be x+1.45 and its base be x2 So: 0.5*(x+1.45)*x = 12.615 multiply both side by 23 Therefore: x2+1.45x-25.23 = )4 Using quadratic equation formula gives x a positive value of 4.355 It follows: height = 5.8 and base = 4.356 Using Pythagoras: hypotenuse = 7.257 Perimeter: 5.8+4.35+7.25 =17.4 cm
1 Let the sides be: x+3.5 and x 2 Using Pythagoras: (x+3.5)(x+3.5)+x2 = 17.52 3 So it follows: 2x2+7x-294 = 0 4 Solving the quadratic equation: x has a positive value of 10.5 5 Perimeter: (10.5+3.5)+10.5+17.5 = 42 cm 6 Area: 0.5*14*10.5 = 73.5 square cm
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