Find the slope of the straight line whose angle of inclination is

(i) 30° (ii) 60° (iii) 90°

Find the area of the triangle formed by joining the midpoints of the sides of a triangle whose vertices are (0, – 1), (2,1) and (0,3). Find the ratio of this area to the area of the given triangle.

Find the angle of inclination of the straight line whose slope is

(i) 1 (ii) √3 (iii) 0

Find the slope of the straight line passing through the points

(i) (3, –2) and (7, 2) (ii) (2, –4) and origin

(iii) and

Find the angle of inclination of the line passing through the points

(i) (1, 2) and (2, 3) (ii) and (0, 0)

(iii) (a, b) and (–a, –b)