Grade X (Second Unit Test-Coordinate Geometry)

Which one is the right condition for the given lines to be parallel?

• m1 = m2

• m1 x m2 = -1

• m1 + m2 = -1

• m1 - m2 = -1

What is the slope of the line 15x - 3 y + 6 =0

• 15

• -3

• 6

• 5

If the two lines 2x - 4y +5 =0 and ax - 8y +3 = 0 are parallel to each other, then what is the possible value of a?

• 2

• 5

• 4

• 3

If two straight lines 5x -4y = 13 and ax-5y=21 are perpendicular to each other, then what is the value of a?

• 4

• -4

• 5

• -5

If any line makes an angle of 60 degree with x-axis, then what is the slope of that line?

• 45

•  $\sqrt{3}$  

•  $\frac{1}{\sqrt{3}}$  

• 1

Slope of any line is $\frac{5}{4}$  , then what is the slope of the perpendicular line to it?

•  $\frac{4}{5}$  

•  $\frac{-4}{5}$  

• 4

• 5

Which one is the parallel line to the line ax + by +c = 0 ?

• bx - ay + k = 0

• ax - by + k =0

• ax + by + k =0

• ax x by x k =0

Which one is the correct form of equation of straight line perpendicular to the line ax+ by +c = 0 ?

• ax - by + k =0

• ax + by +k =0

• bx - ay + k =0

• bx - ay - k =0

Find the value of k so that the line 5 x - ky +7 =0 makes the angle  $45^0$  with x-axis.

• k = 5

• k= -5

• k = 4

• k = -4

If the line joining the points ( 2, a) and (0, 4) is parallel with the line 4x + 2y + 5 =0, then find the value of a?

• 2

• -2

• 0

• 1