Math question urgent help? stuck on equation?

Question

The vertices of quadrilateral PQRS are P(0,5),Q(-9,22),R(-5,8) and S(4,2)
Show that PQRS is not a triangle?

next question 2

An error has been made setting out the square base of a building. The coordinates listed for the corners of the square are (60,20) (90,120) (-10,140) (-40,50) which coordinate pair is incorrect? Explain your choice. What should the coordinates be? write a report explaning what the error is, how it was detected and how it should be corrected.

Answer 1

Well, that's really easy. PQRS would be a quadrilateral. Quadrilaterals are never triangles. This doesn't require any mathematics to show.



-John

Answer 2

You said it's a quadrilateral. If it's a quadrilateral, then it can't be a triangle.

Answer 3

/

2) slope of the lines are

10/3

-1/5

3

-3/10

it is the 3rd point (-10,140) that is out of place