Shape 

Copyright David & Cynthia Thomas, 2009

Area--Exercises

Part I

Do the directed activities in this section.

Part II

Complete the following exercises

1. Find the areas of the triangles having the following vertices.  Use the matrix method.

a. A(0, 0), B(1, 3), and C(3, 4)

b. A(3, 0), B(0, ^-5), and C(^-3, 3)

c. A(^-7, 1), B(3, ^-5), and C(2, 4)

2. Find the areas of the polygons having the following vertices.  Use the matrix method.

a. A(0, 0), B(1, 3), C(3, 4), and D(4, 2)

b. A(^-2, 1), B(^-1, 3), C(2, 3), and D(1, ^-1)

c. A(^-3, ^-1), B(^-2, 1), C(1, 2), and D(^-1, ^-2)