Asked in School SubjectsMath and ArithmeticAlgebraGeometry
Math and Arithmetic
How do you calculate the area of a quadrant?
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Asked in Geometry, Trigonometry
A piece of string 25cm long goes exactly once around the edge of a plate in the form of a quadrant Calculate the area of the quadrant?
Presumably the plate is completely flat. The circumference will be 4*25 = 100 cm. First find the radius of the plate by rearranging the formula: 2*pi*radius = 100cm radius = 100/2*pi = 15.91549431 cm. Now use the formula pi*radius2 to find the area of the plate, and then divide your answer by 4 to give you the area of the quadrant. pi*15.915494312 = 795.7747155/4 = 198.9436789cm2. Therefore, the area of the quadrant is 199 cm2 correct to three significant figures.
What is a Q correlation?
1. For each pair of variables, calculate the q-correlation, using the formula: , where 1. For each pair of variables, calculate the q-correlation, using the formula: , where = number of data points in the upper-right quadrant = number of data points in the lower-left quadrant = number of data points in the lower-right quadrant = number of data points in the upper-left quadrant n = n1 + n2 + n3 + n4