Teachoo MCQ Test

Short Quiz

Preparing for CBSE

Chapter 9 Class 11 Straight Lines | 5 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 480
Question 1 of 5
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Question 1 of 5
Assertion (A): The acute angle between the lines \( y = x \) and \( y = 0 \) is \( 45^\circ \).

Reason (R): The acute angle \( \theta \) between two lines with slopes \( m_1 \) and \( m_2 \) is given by \( \tan \theta = \left|\frac{m_2 - m_1}{1 + m_1 m_2}\right| \).
Select one option. Answers are shown after the test.
Question 2 of 5
Assertion (A): The line passing through \( (2, 3) \) and \( (4, 5) \) is perpendicular to the line passing through \( (3, 4) \) and \( (5, 2) \).

Reason (R): Two non-vertical lines are perpendicular to each other if and only if the product of their slopes is \( 1 \) (i.e., \( m_1 m_2 = 1 \)).
Select one option. Answers are shown after the test.
Question 3 of 5
Assertion (A): The distance of the point \( (0, 0) \) from the line \( 3x - 4y + 10 = 0 \) is \( 2 \).

Reason (R): The perpendicular distance of a line \( Ax + By + C = 0 \) from a point \( (x_1, y_1) \) is \( d = \frac{|Ax_1 + By_1 + C|}{\sqrt{A^2 + B^2}} \).
Select one option. Answers are shown after the test.
Question 4 of 5
Assertion (A): The equation of the line passing through \( (1, 2) \) with slope \( 3 \) is \( 3x - y - 1 = 0 \).

Reason (R): The equation of a line passing through the point \( (x_1, y_1) \) with slope \( m \) is \( y - y_1 = m(x - x_1) \).
Select one option. Answers are shown after the test.
Question 5 of 5
Assertion: The line \(x=4\) has an undefined slope.
Reason: For any two distinct points on \(x=4\), the difference of their \(x\)-coordinates is zero.
Select one option. Answers are shown after the test.