EXAMPLE 1Represent figures using matrices

Write a matrix to represent the point or polygon.

a. Point A

b. Quadrilateral ABCD

EXAMPLE 1Represent figures using matrices

SOLUTION

a. Point matrix for A

b. Polygon matrix for ABCD

x-coordinate

y-coordinate

–4

0

x-coordinates

y-coordinates

–4 –1 4 3

0 2 1 –1

A B C D

GUIDED PRACTICE for Example 1

1. Write a matrix to represent ∆ABC with vertices A(3, 5), B(6, 7) and C(7, 3).

3 6 7

5 7 3

A B C

SOLUTION

2. How many rows and columns are in a matrix for a hexagon?

SOLUTION

2 rows, 6 columns