Polygon ABCD is a rectangle. What is its area? Round your answer to the
nearest tenth.
(2, 5)
(-4, 3)
(-3, 0)
(3, 2)

A. 20.0 square units
B. 19.0 square units
C. 25.6 square units
D. 39.7 square units​

Respuesta :

Answer:

Option A. 20.0 square units

Step-by-step explanation:

Let

[tex]A(2, 5),B(-4, 3),C(-3, 0),D(3, 2)[/tex]

Plot the points

see the attached figure

The area of the rectangle is equal to

[tex]A=AB*AD[/tex]

the formula to calculate the distance between two points is equal to

[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]

step 1

Find the distance AB

[tex]A(2, 5),B(-4, 3)[/tex]

substitute in the formula

[tex]AB=\sqrt{(3-5)^{2}+(-4-2)^{2}}[/tex]

[tex]AB=\sqrt{(-2)^{2}+(-6)^{2}}[/tex]

[tex]AB=\sqrt{40}\ units[/tex]

step 2

Find the distance AD

[tex]A(2, 5),D(3, 2)[/tex]

substitute in the formula

[tex]AD=\sqrt{(2-5)^{2}+(3-2)^{2}}[/tex]

[tex]AD=\sqrt{(-3)^{2}+(1)^{2}}[/tex]

[tex]AD=\sqrt{10}\ units[/tex]

step 3

Find the area of rectangle

[tex]A=AB*AD[/tex]

we have

[tex]AB=\sqrt{40}\ units[/tex]

[tex]AD=\sqrt{10}\ units[/tex]

substitute

[tex]A=(\sqrt{40})*(\sqrt{10})[/tex]

[tex]A=20\ units^{2}[/tex]

Ver imagen calculista