Question

page, Noir
Find the fourth vertes of the parallelogram whose
consecutive vertices are (2,5), (7,4) 15:).
А A​

Answer 1

Step-by-step explanation:

A(8,4)B(5,7)C(−1,1).

Let D(x,y)

m.p of BD = m.p of AC

(

2

5+x

,

2

7+y

)=(

2

8−1

,

2

4+1

)

(

2

5+x

,

2

7+y

)=(

2

7

,

2

5

)

2

5+x

=

2

7

2

7+y

=

2

5

5+x=7 7+y=5

x=2 y=−2

∴D(2,−2)