CBSE Questions for Class 9 Maths Lines And Angles Quiz 4 - MCQExams.com

What is the measure of supplementary angle of $$32^{\circ}$$?
  • $$58^{\circ}$$
  • $$148^{\circ}$$
  • $$138^{\circ}$$
  • $$78^{\circ}$$
If one acute angle of the right angled triangle is half of the other, then the smallest angle is:
  • $$\displaystyle { 90 }^{ o }$$
  • $$\displaystyle { 60 }^{ o }$$
  • $$\displaystyle { 40 }^{ o }$$
  • $$\displaystyle { 30 }^{ o }$$
Two angles the sum of whose measure is $$90^{\circ}$$ are called ______ angles.
  • Supplementary
  • Complementary
  • Corresponding
  • None of these
Which of the following is a straight angle?
  • Angle that is less that $$90^{\circ}$$
  • Angle that is exactly $$90^{\circ}$$
  • Angle that is greater than $$90^{\circ}$$
  • None of these
Find the supplement  of the  angle
$$148^{\circ}$$
  • $$32^{\circ}$$
  • $$122^{\circ}$$
  • $$148^{\circ}$$
  • None of these
In a triangle, the angles are in ratio $$1: 3: 2$$. Find the difference between the greatest and smallest angle of the triangle.
  • $$10^o$$
  • $$70^o$$
  • $$60^o$$
  • $$20^o$$
Corresponding angle converse theorem states that :
  • If two lines and transversal form corresponding angles that are congruent , then the lines are parallel
  • If two lines and transversal form alternate interior angles that are congruent , then the lines are parallel
  • If two parallel lines are cut by Transversal then the pair of corresponding angles are congruent
  • If two lines intersect each other,then the vertically opposite angles are equal
The converse of alternate angle theorem states that :
  • If two parallel lines are cut by Transversal then the pair of corresponding angles are congruent
  • If two parallel lines are cut by transversal, then the pair of alternate interior angles are equal
  • If two lines and a transversal form corresponding angles that are congruent,then the lines are parallel
  • If two lines intersect each other,then the vertically opposite angles are equal
Which type of angle best describes angle Q?
722811_e877ba34ef764a6f934d27b40eddbb5b.png
  • Obtuse
  • Acute
  • Right
  • Straight
The supplement of an acute angle is a/an __________ angle.
  • Acute
  • Obtuse
  • Right
  • Straight
The clock shows the time in the morning. Then, angle represents _________ angle.
722806_29cb87b9d20d4eac801d07989d0d90f3.png
  • Acute
  • Obtuse
  • Reflex
  • Straight
An angle which measures more than $$90^o$$ but less than $$180^o$$ is called ___________.
  • Acute
  • Obtuse
  • Right
  • None of these
The measure of an angle is four times the measure of its supplementary angle. Then the angles are __________.
  • $$36^o, 144^o$$
  • $$40^o, 160^o$$
  • $$18^o, 72^o$$
  • $$50^o, 200^o$$
In the given measure, measure of  $$\angle {b}$$ and $$\angle {x}$$ are
271909_8c874b0d6a4342bf8cac395a5292412c.png
  • $$\angle x = 90^{\circ}\quad \angle b = 60^{\circ}$$
  • $$\angle x = 90^{\circ}\quad \angle b = 30^{\circ}$$
  • $$\angle x = 90^{\circ}\quad \angle b = 90^{\circ}$$
  • $$\angle x = 90^{\circ}\quad \angle b = 180^{\circ}$$
Which one of the following is true for the given triangle?
760060_5cf7086c945e4a4c931a0ede4e4108db.png
  • $$\angle 3 = \angle 1 + \angle 2$$
  • $$\angle 1 = \angle 3 + \angle 2$$
  • $$\angle 2 = \angle 1 + \angle 3$$
  • Both (A) and (B)
Find the supplement of $$98^o$$:
  • $${82^ \circ }$$
  • $${124^ \circ }$$
  • $${122^ \circ }{45^\iota }$$
  • $${135^ \circ }{20^\iota }{26^{\iota \iota }}$$
____ pairs of corresponding angles formed by a transversal of two parallel lines.
  • Two
  • Three
  • Four
  • Eight
State true (T) or false (F)

Lines that meet at a common point are called parallel lines.
  • True
  • False
Say True or False.
The measure of an obtuse angle $$< 90^{\circ}$$.
  • True
  • False
State True or False:
The measure of a reflex angle is $$> 180^{\circ}$$.
  • True
  • False
An angle whose measure is less than that of a right angle is ______.
  • Acute
  • Obtuse
  • Right
  • Straight
An angle whose measure is greater than that of a right angle is ______.
  • Acute
  • Obtuse
  • Right
  • Straight
An angle whose measure is the sum of the measures of two right angles is _______.
  • Acute
  • Obtuse
  • Right
  • Straight
Is the following statement true (T) and which are false (F)?
All the angles of a triangle can be equal to $$ 60^{\circ}$$.
  • True
  • False
Choose the correct option. 
$$60^{\circ}$$ is 
  • Acute angle
  • Obtuse angle
  • Reflex angle
  • none of these
Choose the correct option. 
$$20^{\circ}$$ is
  • Acute angle
  • Obtuse angle
  • Reflex angle
  • None of these
Choose the correct option:-
$$200^{\circ}$$ is ________.
  • Acute $$\angle$$
  • Obtuse $$\angle$$
  • Reflex $$\angle$$
  • none of these
Open any two adjacent fingers of your hand. What kind of angle you get
  • acute
  • right
  • obtuse
  • straight
State whether the following statement are true or false :
'An angle Whose measure is greater than that of right angle is obtuse'.
  • True
  • False
If the sum of two angles is an obtuse angle, then which of the following is not possible :
  • two acute angles
  • one obtuse angles one acute angle
  • two acute angles
  • two right angles
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