Find the area of △DEF with vertices D(−4, −2) , E(−1, −8) , and F(−7, −8) .

Answer 1

If you plot these points you will see that the base is 6 (distance from E to F, count the squares).

The height will be 6 ( distance from line EF to D, again count the squares).

Using the Area formula you get A = 1/2 (6) (6) = 18