CBSE Class 10 Maths Triangles MCQ: Practice for Perfection

Apart from the concepts of Triangles and their different types, there are 9 theorems in total. After understanding the concepts clearly, practising them thoroughly will surely secure better marks in the final exam.

Here is the list of topics and numbers of questions that comes under CBSE Class 10 Maths Triangles MCQ Questions.

• Areas Of Similar Triangles

• Basic Proportionality Theorem

• Criteria For Similarity Of Triangles

• Pythagoras Theorem

• Similar Triangles

Questions on the Geometry part of Class 10 are based on how you are going to apply your concepts about the theorems. The triangle part of geometry is based on sides and angles. As there is no limit on the types of questions that can be set up from these two basic things as well as applying the theorems, only practising more and more MCQs is going to help.

MCQ with Answers For CBSE Class 10 Maths Chapter 6 Triangles 

1. In a triangle ABC, if angle A = $60^\circ$ and angle B = $45^\circ$, what is the measure of angle C?

a) $45^\circ$

b) $60^\circ$

c) $75^\circ$

d) $90^\circ$

Answer: c) $75^\circ$

2. If the lengths of the sides of a triangle are 3, 4, and 5, what type of triangle is it?

a) scalene

b) isosceles

c) equilateral

d) right-angled

Answer: d) right-angled

3. The sum of the angles of a triangle is:

a) $90^\circ$

b) $120^\circ$

c) $180^\circ$

d) $270^\circ$

Answer: c) $180^\circ$

4. In a triangle with two sides being 6 cm and 9 cm, calculate the third side’s maximum possible length?

a) 3 cm

b) 12 cm

c) 15 cm

d) 18 cm

Answer: c) 15 cm

5. If two angles of a triangle measure $50^\circ$ and $70^\circ$, what is the measure of the third angle?

a) $40^\circ$

b) $60^\circ$

c) $70^\circ$

d) $80^\circ$

Answer: a) $40^\circ$

6. In a triangle ABC, if angle A = $45^\circ$ and angle B = $75^\circ$, what is the measure of angle C?

a) $60^\circ$

b) $70^\circ$

c) $80^\circ$

d) $90^\circ$

Answer: a) 60°

7. If the perimeter of a triangle is 18 cm and the lengths of its sides are 5 cm, 6 cm, and x cm, what is the value of x?

a) 5 cm

b) 6 cm

c) 7 cm

d) 8 cm

Answer: c) 7 cm

8. If the lengths of the sides of a triangle are 7 cm, 10 cm, and 13 cm, what type of triangle is it?

a) scalene

b) isosceles

c) equilateral

d) right-angled

Answer: d) right-angled

9. The altitude drawn to the hypotenuse of a right-angled triangle divides it into two triangles, both of which are:

a) similar to each other

b) congruent to each other

c) isosceles

d) equilateral

Answer: a) similar to each other

10. In a triangle ABC, if angle A = $30^\circ$ and angle B = $45^\circ$, what is the measure of angle C?

a) $120^\circ$

b) $105^\circ$

c) $75^\circ$

d) $90^\circ$

Answer: b) $105^\circ$

11. In a triangle ABC, if angle A = $50^\circ$ and angle C = $60^\circ$, what is the measure of angle B?

a) $20^\circ$

b) $40^\circ$

c) $50^\circ$

d) $70^\circ$

Answer: d) $70^\circ$

12. If the lengths of the sides of a triangle are 8 cm, 10 cm, and 12 cm, what type of triangle is it?

a) obtuse

b) isosceles

c) equilateral

d) right-angled

Answer: a) obtuse

13. If the lengths of the sides of a triangle are 5 cm, 5 cm, and 6 cm, what type of triangle is it?

a) scalene

b) isosceles

c) equilateral

d) right-angled

Answer: b) isosceles

14. In a triangle ABC, if angle A = $40^\circ$ and angle B = $80^\circ$, what is the measure of angle C?

a) $40^\circ$

b) $60^\circ$

c) $80^\circ$

d) $100^\circ$

Answer: b) $60^\circ$

15. In a triangle ABC, if angle A = $30^\circ$ and angle C = $90^\circ$, what is the measure of angle B?

a) $30^\circ$

b) $60^\circ$

c) $90^\circ$

d) $120^\circ$

Answer: b) $60^\circ$

Importance of Practicing CBSE Class 10 Maths Triangles MCQ Questions

As per the new guidelines of CBSE, at least 25% of the questions will be of MCQ pattern. One may surely think that this is very relaxing news as they don’t have to write descriptive answers or solve bigger questions but there’s a twist.

• Solving these MCQs requires a certain level of concentration as well as a better understanding of the topics clearly. Sometimes solving some of the questions also requires critical thinking capacity.

• Practice more to master the concepts and know the patterns of the questions beforehand.

Here are some ideas on how you can score full marks in the MCQ portion of the Triangle Chapter.

1. Follow Previous Years' Question Papers for Questions from Chapter 6 Triangles 

After the completion of the syllabus on geometry, when you go for finding Class 10 Maths Triangles MCQ with answers, try to solve several of last year’s questions first. There are several online portals available online to look for solution manuals. If you want to check on the steps of solving the questions, download those.

2. Tips for Solving all of the MCQs Correctly

• Once your concepts about the theorems are clear, you can apply them to solve the questions in no time but if you see that there’s something wrong with your solution and the answer is not in the options, don’t waste time on finding the wrong step. Start solving from the beginning.

• Read the question carefully so that you don’t miss any step.

• Try answering through your mind first and start eliminating those that don’t fit.

• Solve the questions you are confident about first. Don’t start by attending difficult or unknown ones. That will surely kill time.

3. Solve or Practice Questions After Getting your Concepts Clear

Don’t try to solve questions before understanding all of the theorems from Chapter 6-Triangle. It may feel like that looking at solution manuals will give you ideas on how to solve MCQs. This shortcut is never going to help in the examination hall if the questions are unknown to you completely.

Get Worksheets Online for Triangle Chapter NCERT Class 10

There are several worksheets and study materials available online to look for understanding and practice Mathematics. After you complete the NCERT textbook exercises, go for advanced-level questions available online so that the application of concepts becomes solid.

There is no upper limit of CBSE Class 10 Maths Triangles MCQ questions. The more you solve, the more complicated it becomes, and your effectiveness in solving whatever comes next increases.