SSC CGL - Lines and Angles, Triangles Online Test (MCQ Quiz)

1. What is the definition of a line segment?

A) A part of a line that has one endpoint. B) A part of a line that has two endpoints. C) A part of a line that extends infinitely in both directions. D) A curve that does not intersect itself.

2. Which type of angle measures exactly 90 degrees?

A) Acute angle B) Obtuse angle C) Right angle D) Straight angle

3. An angle measuring more than 90 degrees but less than 180 degrees is called:

A) Acute angle B) Obtuse angle C) Reflex angle D) Zero angle

4. What is the sum of the angles in any triangle?

A) 90 degrees B) 180 degrees C) 270 degrees D) 360 degrees

5. Two angles are supplementary if their sum is:

A) 90 degrees B) 180 degrees C) 270 degrees D) 360 degrees

6. If two lines intersect, the angles opposite each other at the intersection are called:

A) Adjacent angles B) Complementary angles C) Vertically opposite angles D) Linear pair angles

7. A triangle with all three sides of equal length is called:

A) Scalene triangle B) Isosceles triangle C) Equilateral triangle D) Right-angled triangle

8. A triangle with at least two sides of equal length is called:

A) Scalene triangle B) Isosceles triangle C) Equilateral triangle D) Obtuse triangle

9. A triangle with no sides of equal length is called:

A) Scalene triangle B) Isosceles triangle C) Equilateral triangle D) Acute triangle

10. In a triangle ABC, if angle A = 50 degrees and angle B = 60 degrees, what is the measure of angle C?

A) 60 degrees B) 70 degrees C) 80 degrees D) 90 degrees

11. What is a ray?

A) A line segment with two endpoints. B) A part of a line with one endpoint and extending infinitely in one direction. C) A part of a line extending infinitely in both directions. D) A closed curve.

12. An angle measuring less than 90 degrees is called:

A) Acute angle B) Obtuse angle C) Right angle D) Straight angle

13. An angle measuring exactly 180 degrees is called:

A) Acute angle B) Obtuse angle C) Right angle D) Straight angle

14. Two angles are complementary if their sum is:

A) 90 degrees B) 180 degrees C) 270 degrees D) 360 degrees

15. If a transversal line intersects two parallel lines, the alternate interior angles are:

A) Equal B) Supplementary C) Complementary D) None of the above

16. If a transversal line intersects two parallel lines, the corresponding angles are:

A) Equal B) Supplementary C) Complementary D) None of the above

17. A triangle with one angle measuring 90 degrees is called:

A) Acute triangle B) Obtuse triangle C) Right-angled triangle D) Equilateral triangle

18. A triangle with all three angles less than 90 degrees is called:

A) Acute triangle B) Obtuse triangle C) Right-angled triangle D) Scalene triangle

19. A triangle with one angle greater than 90 degrees is called:

A) Acute triangle B) Obtuse triangle C) Right-angled triangle D) Isosceles triangle

20. In triangle ABC, if angle A = 40 degrees and angle B = 70 degrees, what is the measure of angle C?

A) 50 degrees B) 60 degrees C) 70 degrees D) 80 degrees

21. What is the angle formed by a line and itself?

A) 0 degrees B) 90 degrees C) 180 degrees D) 360 degrees

22. An angle that is greater than 180 degrees but less than 360 degrees is called:

A) Acute angle B) Obtuse angle C) Reflex angle D) Straight angle

23. If two adjacent angles form a straight line, they are called:

A) Complementary angles B) Supplementary angles C) Vertically opposite angles D) Right angles

24. If a transversal line intersects two parallel lines, the sum of consecutive interior angles is:

A) 90 degrees B) 180 degrees C) 270 degrees D) 360 degrees

25. In an isosceles triangle, the angles opposite the equal sides are:

A) Unequal B) Complementary C) Supplementary D) Equal

26. The sum of the lengths of any two sides of a triangle is always _____ the length of the third side.

A) Less than B) Equal to C) Greater than D) Twice

27. If one angle of a triangle is obtuse, the other two angles must be:

A) Obtuse B) Right C) Acute D) Zero

28. In triangle PQR, if angle P = 30 degrees and angle Q = 100 degrees, what is the measure of angle R?

A) 40 degrees B) 50 degrees C) 60 degrees D) 70 degrees

29. Which of the following is NOT a type of triangle based on angles?

A) Acute triangle B) Obtuse triangle C) Scalene triangle D) Right-angled triangle

30. What is the measure of an angle that is complementary to 30 degrees?

A) 30 degrees B) 60 degrees C) 90 degrees D) 120 degrees

31. What is the measure of an angle that is supplementary to 120 degrees?

A) 30 degrees B) 60 degrees C) 90 degrees D) 180 degrees

32. If two lines are perpendicular, they intersect at an angle of:

A) 0 degrees B) 45 degrees C) 90 degrees D) 180 degrees

33. An angle formed by two rays originating from the same point is called:

A) A line B) A plane C) An angle D) A vertex

34. In an equilateral triangle, each angle measures:

A) 45 degrees B) 60 degrees C) 90 degrees D) 120 degrees

35. If a line is parallel to one of two parallel lines, it is also parallel to the:

A) Transversal line B) Third line C) Intersecting line D) Perpendicular line

36. Which property states that the sum of angles in a triangle is 180 degrees?

A) Pythagorean theorem B) Triangle angle sum theorem C) Exterior angle theorem D) Isosceles triangle property

37. In triangle XYZ, if angle X = 90 degrees and angle Y = 45 degrees, what is the measure of angle Z?

A) 30 degrees B) 45 degrees C) 60 degrees D) 90 degrees

38. A triangle can have at most how many right angles?

A) Zero B) One C) Two D) Three

39. A triangle can have at most how many obtuse angles?

A) Zero B) One C) Two D) Three

40. If a line segment AB is parallel to line segment CD, and line segment BC is parallel to line segment AD, then ABCD is a:

A) Trapezoid B) Kite C) Parallelogram D) Rhombus

41. An angle formed by two opposite rays is a:

A) Acute angle B) Right angle C) Obtuse angle D) Straight angle

42. In a triangle, the exterior angle is equal to the sum of the two:

A) Adjacent interior angles B) Opposite interior angles C) Right angles D) Straight angles

43. If triangle ABC is congruent to triangle DEF, then which of the following is true?

A) Angle A = Angle E B) Side AB = Side EF C) Angle C = Angle F D) Side AC = Side DE

44. The point where two sides of a triangle meet is called:

A) Base B) Height C) Vertex D) Median

45. If a point lies on a line, it divides the line into how many parts?

A) Zero B) One C) Two D) Infinite

46. What is the angle formed when two rays coincide?

A) 0 degrees B) 90 degrees C) 180 degrees D) 360 degrees

47. If a triangle has sides of length 3, 4, and 5, what type of triangle is it?

A) Acute triangle B) Obtuse triangle C) Right-angled triangle D) Equilateral triangle

48. In the given figure, if line L is parallel to line M and line T is a transversal, which angle is alternate interior to angle 4?

A) Angle 5 B) Angle 6 C) Angle 3 D) Angle 7

49. What is the minimum number of points required to define a unique line?

A) One B) Two C) Three D) Four

50. If a triangle has angles 50 degrees, 50 degrees, and 80 degrees, it is:

A) Scalene and acute B) Isosceles and acute C) Isosceles and obtuse D) Equilateral and acute

Lines and Angles, Triangles - Online Test

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