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Mathematics 16 Online
OpenStudy (anonymous):

Rectangle ABCD has the coordinates shown. A (2,1) B (1,3) C (5,5) Find the coordinates of point D. A). (5,3) B). (6,2) C). (6,3) D). (7,2)

OpenStudy (ivancsc1996):

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jimthompson5910 (jim_thompson5910):

the same idea will be used as last time 1) plot all 3 points 2) find the slope from B to C 3) start at A and follow the same slope to get to D

jimthompson5910 (jim_thompson5910):

this works because a rectangle is a parallelogram

OpenStudy (anonymous):

okay, I thought so. let me do the work and I'll come back to ya.

OpenStudy (anonymous):

for my slope I got 1/2 is that right?

jimthompson5910 (jim_thompson5910):

good

jimthompson5910 (jim_thompson5910):

but in this case, it helps to not reduce the fraction

jimthompson5910 (jim_thompson5910):

so keep it at 2/4

OpenStudy (anonymous):

0.5

jimthompson5910 (jim_thompson5910):

now start at A, go up 2, then over to the right 4

OpenStudy (anonymous):

I got B. (6,2)

jimthompson5910 (jim_thompson5910):

close

OpenStudy (anonymous):

no no no , 6,3?

jimthompson5910 (jim_thompson5910):

better

OpenStudy (anonymous):

:) thanks

jimthompson5910 (jim_thompson5910):

yw

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