Chapter 13, Lesson 12


13-12.A find horizontal and vertical distances on the coordinate plane
Find the length of each line segment.
a. AB with endpoints at A(—9, 4) and B(3, 4)
b. PQ with endpoints at P(7, —6) and Q(7, 5)

13-12.B understand scale factor
Brian drew a right triangle with sides that measure 3 in., 4 in., and 5 in. Using a scale factor of 3, Dina drew a right triangle similar to Brian's. What is the perimeter of the triangle Dina drew?

13-12.C use the area formula for triangles
Find the area of triangle ABC.