Straight Lines ...

If coordinates of P,Q, and R are (3,6),(-1,3) and (2,-1) respectively. Then area of $$\displaystyle \triangle PQR$$ is ____ square units.

Find the slopes of the line whose inclination is $$135^\circ$$.

The area of triangle formed by $$(0, 0), (0, a)$$ and $$(b, 0)$$ is .......... .

The inclination of a line is $$30^{\circ}$$, then the slope of the line is

The points $$(6, 2), (2, 5)$$ and $$(9, 6)$$ form the vertices of a __triangle.

Area of triangle whose vertices are $$(0, 0), (2, 3), (5, 8)$$ is ____ square units.

The area of a triangle with the vertices $$(1, 2), (3, 4)$$ and $$(5, 6)$$, is ____ square units.

One end of a diagonal of a square is $$(2, 0)$$ and its slope is $$1$$. If the length of the side of a square is $$2$$ units, then write all the possible coordinates of the other end.

If $$(1, 2), (3, 4)$$ and $$(0, 6)$$ are the three vertices of a parallelogram taken in that order, then the fourth vertex is .......... .

Find the area of $$\Delta ABC$$, in which $$A = (2, 1), B = (3, 4)$$ and $$C = (-3, -2).$$