In ΔABC, ∠A = 50° and the external bisectors of ∠B and ∠C meet at O as shown in figure. The measure of ∠BOC is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 1
  • 40°
  • 65°
  • 115°
  • 140°
In figure the value of x is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 2
  • 120°
  • 130°
  • 110°
  • 100°
An exterior angle of a triangle is 80° and the interior opposite angles are in the ratio 1 : 3, measure of interior opposite angles are
  • 30°, 90°
  • 40°, 120°
  • 20°, 60°
  • 30°, 60°
In ΔABC, the bisectors of ∠ABC and ∠BCA intersect each other at O. The measure of ∠BOC is
  • 90° + ∠A
  • 90° + \(\frac{∠A}{2}\)
  • 180 - ∠A
  • 90° - \(\frac{∠A}{2}\)
In figure if ∠A + ∠B + ∠C + ∠D + ∠E + ∠F = k right angles, then find value of k.
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 3
  • 2
  • 3
  • 4
  • 5
In the given figure, the measure of ∠ABC is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 4
  • 80°
  • 20°
  • 100°
  • 60°
The angle of a triangle are in the ratio 5 : 3 : 7, the triangle is
  • an acute-angled triangle
  • an obtuse angled triangle
  • an right angled triangle
  • an isosceles triangle.
In figure l1 || l2, the value of x is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 5
  • 80°
  • 100°
  • 110°
  • 70°
If one angle of triangle is equal to the sum of the other two, then the triangle is
  • an isosceles triangle
  • an obtuse-angled triangle
  • an equilateral triangle
  • a right triangle
One of the angles of a triangle is 75°. If the difference of other two is 35°, then the largest angle of other two angles has a measure
  • 80°
  • 75°
  • 70°
  • 135°
An exterior angle of a triangle is 105° and its two interior opposite angles are equal. Each of these equal angles is
  • 37 \(\frac{1°}{2}\)
  • 52 \(\frac{1°}{2}\)
  • 72 \(\frac{1°}{2}\)
  • 75°
In Figure measure of ∠ABC is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 6
  • 60°
  • 70°
  • 80°
  • 50°
In Figure AB || CD, the value of x is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 7
  • 35°
  • 40°
  • 60°
  • 75°
In the figure, PS ⊥ l, RQ ⊥ l, the degree measure of y is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 8
  • 55°
  • 90°
  • 80°
  • 135°
Each angle of an equilateral triangle is
  • 50°
  • 90°
  • 54°
  • 60°
Given lines l1 || l2 and l2 || l3 in figure. The value of x is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 9
  • 40°
  • 140°
  • 50°
  • 80°
In figure, find the value of y.
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 10
  • 28°
  • 40°
  • 140°
  • 56°
In the given figure, if AOB is a straight line, then ∠BOC is
MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers 11
  • 80°
  • 70°
  • 60°
  • 20°
Which one of these is false?
  • In a linear pair,if one angle is acute ,other will be obtuse
  • The sum of the angles of the triangle is 180°
  • Angles forming a linear pair are supplementary
  • None of the above
When two lines intersect each other ,which one of the following is true
  • Vertically opposite angles are equal
  • adjacent angles are complementary
  • Vertically opposite angles are supplementary
  • None of these
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