50 points
Help if you know.
Thanks.

Step-by-step explanation:

Refer to attached

You can easily calculate that each of the sides have the length:

Parallel sides have equal slopes:

Diagonals are perpendicular as their slopes are negative reciprocal:

So we see the quadrilateral ABCD has two pairs of parallel sides, all sides are equal and the diagonals are perpendicular.

This is the definition of the rhombus.

answer: 0,6

step-by-step explanation:

this would make it the y intercept.

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column