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CBSE Questions for Class 9 Maths Lines And Angles Quiz 11 - MCQExams.com
CBSE
Class 9 Maths
Lines And Angles
Quiz 11
$$a$$ and $$c$$ are not
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Corresponding angles
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Alternate interior angles
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Alternate exterior angles
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Interior angles on the same side
$$E$$ and $$F$$ are Corresponding angles.
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True
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False
BCD is a line segment and Angle BAC$$=1_{/4}$$ Angle ACB; Angle ACD$$=?$$
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$$140$$
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$$100$$
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$$120$$
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$$60$$
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It cannot be determined from the information given
In the adjacent figure, BA and BC are produced to meet CD and AD produced in E and F. Then $$\angle AED + \angle CFD$$ is ________.
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$$80^o$$
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$$50^o$$
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$$40^o$$
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$$160^o$$
Explanation
In $$\triangle AED,$$
$$\angle AED+\angle EAD+90°=180°\\ =>\angle AED+\angle EAD=90°\\ =>\angle EAD=90°-\angle AED........(i)$$
Also, $$\\ \angle EAD=50°+\angle AFB.........(ii)$$ (exterior angle property)
From $$(i)$$ and $$(ii)$$, we have,
$$50°+\angle AFB=90°-\angle AED\\ =>\angle AFB+\angle AED=40°\\ =>\angle AED+\angle CFD=40°\quad (\angle AFB=\angle CFD)$$.
Therefore, option $$C$$ is correct.
Lines AC and BD intersect at point E. Angle BEC is $$45^o$$. What is the measure of angle AEB?
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Angle AEB is $$90^o$$
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Angle AEB is $$115^o$$
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Angle AEB is $$135^o$$
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Angle AEB is $$180^o$$
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Angle AEB is $$360^o$$
The curve x + y = $$e^x$$$$^y$$ has a tangent parallel to y-axis at the point
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(0, 1)
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(1, 0)
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(1, 1)
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None of these
A reflex angle is ______ a straight angle.
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Smaller than
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Larger than
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Equal to
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One-half of
In the given figure, magnitude of angles are ..........
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$$40^\circ\,,120^\circ$$
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$$30^\circ\,, 90^\circ$$
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$$45^\circ\,,135^\circ$$
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$$50^\circ\,,150^\circ$$
Explanation
Given:
we know that angle constructed by a st line is $$180^o$$
So, $$x^o+3x^o = 180^o$$
$$4x^o = 180^o$$
$$x = 45^o$$
Hence $$3x = 45\times 3$$
$$=135^o$$
$$\therefore$$ option C is correct
Write 'True' or 'False'.
An angle smaller than right angle is acute angle
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True
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False
If two straight lines intersect, the measures of the vertically opposite angles are ..........
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Equal
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Not equal
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Right angle
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Can't be deternrined
Which of the following is a pair of complementary angles?
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$$45^\circ ,50^\circ $$
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$$70^\circ ,20^\circ $$
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$$30^\circ ,90^\circ $$
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$$65^\circ ,15^\circ $$
On the basis of the information provided below, answer the following quesiton
P, Q, R, S, T and U are sitting on a circle facing center at equal distances. P is not adjacent to Q and R
-S is not adjacent to R or T
-Q and R are adjacent
-U is in between R and S.
who is placed vertically opposite to T?
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Q
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R
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S
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U
A_____angles form by intersecting any two lines are always congruent.
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Alternate angles.
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Interior angles
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Vertically opposite angle
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Corresponding angles.
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