Question

Exercise #5: Quadrilateral EFGH has vertices at E(-6,2), F(3,8), G(7,2), and H(-2,-4).

Calculate the slopes of all four sides of EFGH. Use these slopes to prove that EFGH is a rectangle.

Answer 1

The slope of both EF and GH are 2/3

The slope of both FG and EH are -3/2

You can see that these slopes are perpendicular, forming a rectangle

Explanation:

To find slope use the slope formula: y1 - y2 / x1 - x2

so first:

8 - 2 / 3 - (-6) = 2/3

(-4) - 2 / (-2) - 7 = 2/3

Then:

8 - 2 / 3 - 7 = -3/2

2 - (-4) / (-6) - (-2) = -3/2