Question

The coordinate plane has the following points A=(2, 1), B=(5, 1), C=(7,2), and 1 point

D=(4,2). What is the length of CD?

Answer 1

d = 3

Explanation:

Coordinate Plane

The image provided shows the four points given:

A=(2, 1), B=(5, 1), C=(7,2), D=(4,2).

It can be clearly seen the length of CD is just the difference of their x-coordinates:

CD = 7 - 4 = 3

We can also use the formula of the distance.

Given two points C(x,y) and D(w,z), the distance between them is:

`d=√((z-y)^2+(w-x)^2)`

`d=√((2-2)^2+(7-4)^2)`

`d=√(0^2+3^2)`

`d=√(9)`

d = 3