4 and -6 because 4 times -6 equals -24 and if you add 4 and -6 the you get -2
CBD.
The two small lines on the base are similar, and it's a right angle, so the two are similar.
Also, the position of the points has to be the same in the triangle labels.
because we use simple rule of three
2 inches ---------------- 5 miles
20inch -------------- xmiles
x = 100/2
x = 50