It’s time for a lesson in shooting, again.
First, get a ruler, a pencil, and an 8” by 11” piece of paper.
Lay the paper down on a table with the 11” side on the bottom. With the ruler, draw a 1” line extending from the bottom right corner to a point one inch up on the right side of the paper. This represents the goalpost. Then draw a 10” line from the bottom of the goalpost (bottom right corner of the paper) toward the other corner of the paper. Using your ruler again, connect the end points of the 10” and 1” lines to form a scalene triangle, with a right angle at the bottom right corner of the paper.