Question

Help please :)
Prove or disprove that the quadrilateral defined by the points A(6,2), B(3,4), C(1,1), D(4,-1) is a rectangle.

Answer 1

@Directrix

Answer 2

Find the slope of segment AB

A(6,2), B(3,4),

Use that online slope calculator if you like.

Answer 3

http://calculator.tutorvista.com/slope-calculator.html

Answer 4

Slope(m)=-0.667 @Directrix

Answer 5

another approach
think about the characteristics of a rectangle
example 2 pairs of parallel congruent sides; cross at right angles
to cross at right angles means the lines are perpendicular
find the lengths and the slopes to use in your proof

Answer 6

do you have enough information now or do you need more?