For each example I will substitute the given values into the equation and then solve. Then subtract the y-values this gives you the length of the vertical leg. A a 2 b b -2 c a b d b - a.
D x2 x1 y2 y1 Make sure the students understand what the x2 and x1 are and the same for the ys.
The teacher will ask questions to guide the review and the steps to take to find the formula. Also they work with a partner which keeps them working and engaged. Then they work to discover the distance formula which they get to try out. E 42f 32g 462h 22 2.