(Q3)Let A(x
1
, y
1
) , B(x
2
, y
2
) , C(x
3
, y
3
) be three points. Then find the area of the following triangle and discuss with your friends in groups about the area of that triangle.
X
X'
Y
Y'
A
B
C
(0,0)
(x1,y1)
(0,y2)
x1
y2
A(x
1
,y
1
) = (x
1
,y
1
)
B(x
2
,y
2
) = (0,y
2
)
C(x
3
,y
3
) = (0,0)
Area of △ABC =
1
2
×base×height
=
1
2
×
2
×
1
=
1
2
|
1
2
| sq.units
Clear