Question

plot the points A(2,1),B(5,1) and C(2,7) on x-y plane with the scale 1cm=1unit. find the area of the triangle ABC.

class 9 coordinate geometry​

Answer 1

Answer:

25

Step-by-step explanation:

formula =1/2 X1( Y2-Y3 ) + X2 (Y3-Y1) + X3 ( Y1- Y2)

2 ( 1-7 ) = -12

5(7-1) = 36

2 ( 1-1 ) = 2

1/2 ( -12 + 36 + 2 )

1/2 ( 50 )

25 cm

Answer 2

Answer:

25

Step-by-step explanation:

formula =1/2 X1( Y2-Y3 ) + X2 (Y3-Y1) + X3 ( Y1- Y2)

2 ( 1-7 ) = -12

5(7-1) = 36

2 ( 1-1 ) = 2

1/2 ( -12 + 36 + 2 )

1/2 ( 50 )

25 cm