We need to find the distance between two points on Rectangular Coordinate Plane. Triangle ABC is a right triangle with AC the hypotenuse. We join P and Q and make a right triangle PQR as shown in the figure below.
Step-by-step explanation is provided.
How to find the angle of a right triangle. D x 2 - x 1 2 y 2 - y 1 2 The expression x 2 - x 1 is read as the change in x and y 2 - y 1 is the change in y. A 90 - v. If you know one angle apart from the right angle calculation of the third one is a piece of cake.