WXYZ is a rhombus with vertices W(0,4b), X(2a,0), Y(0,-4), Z(-2,0). You can see thap points W and Y lie on the y-axis and points X and Z lie on the x-axis. Then the centre of the rhombus is origin, thus W and Y are symmetric about the origin. Then b=1 and point W has coordinates (0,4). Similarly points X and Z are symmetric about the origin and a=1, hence X(2,0).
Let KLMN be middlepoints of segments WX, XY, YZ, ZW, respectively. Then
.
Now find the vectors
,
,
and
:
that means that
.
Similarly,
,
,
.
You prove that KLMN is a recctangle.
Answer:
Step-by-step explanation:
Answer:
321 304
Step-by-step explanation:
is divisible by 4 so is 321 308
Bob would take as long as 6 hours to paint the house:
x=12÷2
x=6