Skeletal surveys are also used with suspected non-accidental injury in children (CE guidelines state that 19 images of the child are taken.) These are reported on by a consultant paediatric radiologist and often copies are made.
Distance Formula and Pythagorean Theorem. The distance formula is derived from the Pythagorean theorem. To find the distance between two points (x 1 ,y 1) and (x 2 ,y 2), all that you need to do is use the coordinates of these ordered pairs and apply the formula pictured below. The distance formula is. $ \text{ Distance } = \sqrt{(x_2 -x_1)^2 + (y_2- y_1)^2} $.
Using the Coordinate System Approach for other values of K. First, choose a position in the coordinate system and locate the three vertices A, B, and C. Using the distance function, write a formula for the distances PA, PB, and PC where (x,y) is the variable point P. Here are the graphs for K = 1.8, 2, and 2.2.