#### • Class 11 Physics Demo

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Question:and measure a solid with irregular shape?

Answers:well a CMM will do that, but an easier way is to place the object in a graduated container of water and measure the change in water level (assuming the object does not float.)

Question:I have a parcel with four sides with lengths of 111 on the north, 120 on the south, 83 on the west and 95 on the east. I do not know any of the angles and presume that none of them are right angles. Also presume that none of the sides are parallel to each other. I can't divide it into two triangles and calculate those areas using the formula 1/2 b X h because neither of the triangles would have a right angle. How do I go about calculating the area?

Answers:Use the Brahmagupta Formula, A = SqRt[(s-a)(s-b)(s-c)(s-d)], where a, b, c and d are the lengths of the four sides of the quadrilateral, and s = (a + b + c + d)/2. s = (111 + 120 + 83 + 95)/2 = 204.5 Area = Square Root [(204.5 - 111)(204.5 - 120)(204.5 - 83)(204.5 - 95)] = Square Root [93.5 x 84.5 x 121.5 x 109.5] = SqRt [105,113,553.2] = 10,252.4901

Question:d=diameter c= curcumfrence r= radius b= base h= height l= length w= width I need the formulas for a rectangular prism, a triangular prism, a cylendar, a sphere, and a cone. I left my math notes at school so help would be greatly apprecieated. Its for a test review, and I cant remember the formulas, so if you have a way of remembering them, that'd be great too. Nothing nessicary though. Thanks so much to whoever can help me

Answers:this is a good website http://www.math.com/tables/geometry/volumes.htm

Question:Please include links too, if possible. Thanks!

Answers:For additional information, please see also: http://en.wikipedia.org/wiki/Volume http://en.wikipedia.org/wiki/Perimeter http://en.wikipedia.org/wiki/Trigonometry http://en.wikipedia.org/wiki/Geometry http://en.wikipedia.org/wiki/Calculus "May The Lord Jesus Christ continue to bless you in all of your endeavors." Sincerely, willard-thomas_jr@yahoo.com (a.k.a. calvaliear)