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Triangles — Practice Quiz

ICSE · Class 7 · Mathematics

Try a 4-question quiz on Triangles for ICSE Class 7 Mathematics: tap an answer to check it and see why. 45 questions in the full chapter test.

45 questions24 flashcards8 formulas & key relations5 concepts

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Quick Quiz: Triangles

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Tap an answer to check it instantly. No sign-up needed for these 4.

1

In triangle ABC, A = 35b0 and B = 65b0. Find C using the angle sum property.

2

In an isosceles triangle, the vertex angle is 50b0. Find each base angle.

3

In triangle ABC, one exterior angle at C is 130b0 and the two interior opposite angles are in the ratio 3:4. Find the two interior opposite angles.

4

A triangle has angles in the ratio 5:3:4. What is the difference between the largest and smallest angle?

45 Questions·
multiple choicemultiple correct

Sample Questions

1multiple choice
3 marks

In triangle ABC, A = 55b0 and B = 45b0. A side is produced at C to form an exterior angle. Find that exterior angle.

Show answer

100b0

The exterior angle equals the sum of the two interior opposite angles. So the exterior angle at C = 55b0 + 45b0 = 100b0.

2multiple choice
3 marks

In an isosceles right angled triangle, what are the two equal acute angles?

Show answer

45b0 and 45b0

One angle is 90b0. The other two angles are equal and their sum is 90b0. So each one is 45b0.

3multiple choice
3 marks

In triangle ABC, A = 2x + 20b0, B = x + 30b0, and C = 2x - 10b0. Find x.

Show answer

28

Use the angle sum property: (2x + 20) + (x + 30) + (2x - 10) = 180. This gives 5x + 40 = 180, so 5x = 140 and x = 28.

4multiple choice
3 marks

A triangle has two angles 48b0 and 73b0. Find the third angle.

Show answer

59b0

The sum of the three angles is 180b0. The known angles add to 121b0, so the third angle is 180b0 - 121b0 = 59b0.

+41 more questions on Triangles (ICSE Class 7 Mathematics)

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Frequently Asked Questions

What are the important topics in Triangles for ICSE Class 7 Mathematics?
Key topics in Triangles include Basic Parts of a Triangle, Angles in a Triangle, Classification of Triangles, Isosceles and Equilateral Triangle Properties. Study these first, then practise questions on each for Class 7 exams.
How many practice questions are there for Triangles?
There are 45 questions on Triangles. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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