For the convex hull algorithm we have to be able to test whether a point r lies left or right of the directed line through two points p and q. Let p = (px, py), q = (qx, qy), and r = (rx, ry).
a) Show that the sign of the determinant
1 pxpy
D= 1qxqy
1 rxry
determines whether r lies left or right of the line.
b) Show that |D| in fact is twice the area of the triangle determined by p, q, and r.
c) Why is this an attractive way to implement the basic test in algorithm CONVEXHULL? Give an argument for both integer and floating point coordinates.

A911 dispatcher is the sole sender of messages to all police officers. while on patrol, officers communicate with the dispatcher who, in turn, relays messages to other officers. the officers do not communicate directly with one another. this illustrates a network.

Create a string list. 2. use console.readline() to collect values of firstname, lastname, street, city, state, zip, save them to list. 3. write a simple linq statement, call method uppercasewords() to change first letter to uppercase. 4. create a foreach statment to display the information. public static string uppercasewords(string value) { char[] array = value.tochararray(); if (array.length > = 1) { if (char.islower(array[0])) { array[0] = char.toupper(array[0]); } } for (int i = 1; i < array.length; i++) { if (array[i - 1] == ' ') { if (char.islower(array[i])) { array[i] = char.toupper(array[i]); } } } return new string(array);

Think of a spreadsheet as a giant calculator spread of paper chart data collector