SOLUTION: do the diagonals of ABCD bisect each other?
A(-1,-7), B(-3,-5), C(-2,2), D(0,0)
There is nothing in my notes on this and I emailed my teacher asking for help. So any help
Question 1137449: do the diagonals of ABCD bisect each other?
A(-1,-7), B(-3,-5), C(-2,2), D(0,0)
There is nothing in my notes on this and I emailed my teacher asking for help. So any help is appreciated. Thanks! Found 2 solutions by greenestamps, MathLover1:Answer by greenestamps(13206) (Show Source): You can put this solution on YOUR website!
The diagonals of quadrilateral ABCD bisect each other if and only if the midpoints of diagonals AC and BD are the same point.
Use the given coordinates to find the midpoints of AC and BD to find the answer to the problem. Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website! If a quadrilateral is a , then the diagonals each other.
If || , || , it’s a parallelogram. Parallel lines have .
So, if slope of = to slope of , and slope of = to slope of then it’s a .
slope of is
slope of is
=>slope of is same
slope of is
slope of is
=>slope of and is same
hence, || , || ,=> is a
that is enough to prove the diagonals of bisect each other
you can also do it this way:
find midpoint of diagonals and , prove that distances and
We use the midpoint formula to solve. The x coordinate is Plug in the values,
The x coordinate is -1.5. Now for the y.
The y coordinate is -2.5. The midpoint is at point (-1.5,-2.5).
midpoint of diagonal AC:is at point (-1.5,-2.5)
The distance
The distance
We use the midpoint formula to solve. The x coordinate is Plug in the values,
The x coordinate is -1.5. Now for the y.
The y coordinate is -2.5. The midpoint is at point (-1.5,-2.5).