Angle Sum Property of A Triangle

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. An exterior angle of triangle is 80° and the interior opposite angles are in the ratio 1:3. Measure of each interior opposite angle is:

30°, 60°

30°, 90°

40°, 120°

20°, 60°

Question 1 of 20

2. The angles of a triangle are in the ratio 2:3:4.So, the degree measures of the angles are

20, 30, 40

40, 60, 80

80, 20, 80

10, 15, 20

Question 2 of 20

3. In fig. if x°, y° and z° are exterior angles of ΔABC, then x° + y° + z° is:

180°

270°

90°

360°

Question 3 of 20

4. The angles of a triangle are in the ratio 2 : 3 : 4. The angles, in order, are :

80°, 40°, 60°

20°, 60°, 80°

40°, 60°, 80°

60°, 40°, 80°

Question 4 of 20

5. The value of x in the given figure is

30°

80°

40°

50°

Question 5 of 20

6. One of the angles of a triangle is 75°. If the difference of the other two angles is 35°, then the larger angle of the other two angles of the triangle has a measure of:

80°

70°

135°

100°

Question 6 of 20

7. In ΔABC fig., ∠x + ∠y + ∠z is equal to:

360°

120°

240°

180°

Question 7 of 20

8. An exterior angle of a triangle is 80° and two interior opposite angles are equal. Measure of each of these angle is:

100°

120°

40°

60°

Question 8 of 20

9. The measure of angle a in the figure below is :

98°

78°

62°

80°

Question 9 of 20

10. In fig., in ΔABC, AB = AC. The value of x is:

80°

100°

130°

120°

Question 10 of 20

11. The sum of two angles of a triangle is 116° and their difference is 24°. The measure of each angle of the triangle is

40°, 60°, 80°

70°, 46°, 64°

70°, 50°, 60°

60°, 90°, 30°

Question 11 of 20

12. Of the three angles of a triangle, one is twice the smallest and another is thrice the smallest. The angles of the triangle will be

70°, 50°, 60°

40°, 60°, 80°

80°, 50°, 50°

60°, 90°, 30°

Question 12 of 20

13. The bisectors of the base angles of an isosceles triangle ABC, with AB=AC, meet at O. If ∠B = ∠C = 50°. What is the measure of angle O?

120°

130°

80°

150°

Question 13 of 20

14. In a triangle ABC if ∠A = 53° and ∠C = 44° then the value of ∠B is:

46°

83°

93°

73°

Question 14 of 20

15. Find the measure of angle marked e in the figure below:

150°

50°

100°

30°

Question 15 of 20

16. If in triangle DEF, the greatest angle is twice the smallest and the third angle is 20 degrees more than the smallest, what are the angles?

20°, 40°, 40°

40°, 60°, 80°

30°, 50°, 100°

30°, 60°, 80°

Question 16 of 20

17. If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the ____ interior opposite angles.

Two

Four

One

Three

Question 17 of 20

18. If one angle of a triangle is equal to the sum of the other two angles, then the triangle is:

An equilateral triangle

An isosceles triangle

A right triangle

An obtuse angled triangle

Question 18 of 20

19. An exterior angle of a triangle is 110°; and one of the interior opposite angles is 30°, then the other two angles of the triangle are

50°, 60°

70°, 80°

60°, 70°

120°, 80°

Question 19 of 20

20. In the figure, AC is perpendicular to CE and ∠A:∠B:∠C = 3:2:1, the measure of ∠ECD is

90°

80°

40°

60°

Question 20 of 20

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