counting of triangles and straight lines

The line joining the foot of perpendicular drawn from a point lying on the circumcircle. Of a triangle to the sides of a triangle is a straight line.

The perimeter of a triangle is 22 cm. Through each vertex of the triangle, a straight line parallel to the opposite side is drawn. What is the perimeter of triangle formed by these lines ?

Area of triangle formed by straight lines 4x - y = 4, 3 x + 2y = 14 and y -axis is

Area of triangle formed by straight lines x +y = 4, 2x - y =2 and x -2 = 0 is

Area of triangle formed by straight lines 3x - 4y = 0, x = 4 and x-axis

Area of triangle formed by straight lines 3x + 4y = 24, x = 8 and y =1

Area of triangle formed by straight lines x = 0, x + 2y = 0 and y = 1

Area of triangle formed by straight lines x - y = 0, x + y = 0 and 2 x = 1

Area of triangle formed by straight lines 3x - y = 3, x - 2y + 4 =0 and y =0 is

Area of triangle formed by straight line y = mx + c with coordinate area