Find the perimeter of the following shape:

Shape ABCD is shown. Point A is at 7, 5. Point B is at 6, 3. Point C is at 3, 2. Point D is at 4, 4.

10.8
11
11.4
11.6

Question

Find the perimeter of the following shape:

Shape ABCD is shown. Point A is at 7, 5. Point B is at 6, 3. Point C is at 3, 2. Point D is at 4, 4.

 10.8
 11
 11.4
 11.6

anonymous · Answer

attachment

welshfella · Answer

this is a parallelogram with opposite sides equal so you only need to find the lengths of AB and BC

anonymous · Answer

So whats the next step?

welshfella · Answer

do you know the formula for the length of a line given the coordinates of its endpoints?

anonymous · Answer

No.

welshfella · Answer

use this formula to find the lengths of AB and BC

welshfella · Answer

Ok its 
 Sqrt [ (y2-y1)^2 = (x2-x1)^^2]
where (x1,y1) and (x2,y2) are the 2 endpoints

welshfella · Answer

* that = should be a +

welshfella · Answer

so for point A we  have  x1 = 7 and y1 = 5
and for point B we have x2 = 6 and y2 = 3

plug these into the formula

anonymous · Answer

11.6?

welshfella · Answer

how did you get that?

welshfella · Answer

AB = sqrt [(3-5)^2 + (7-6)^2] = sqrt(4 + 1) = sqrt5
opposite side CD = sqrt5
can you find the length of BC in a similar way?

welshfella · Answer

did you follow  the above calculations?