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Triangles

Gujarat Board · Class 9 · Mathematics

Most important questions from Triangles for Gujarat Board Class 9 Mathematics board exam 2026. MCQs, short answer, and long answer questions with marks.

44 questions22 flashcards5 concepts

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44 Questions·
multiple choicemultiple correcttext answertrue falsematchingordering

Sample Questions

1multiple correct

Which of the following are valid congruence rules for triangles?

Show answer

SAS (Side-Angle-Side), ASA (Angle-Side-Angle), AAS (Angle-Angle-Side), RHS (Right-Hypotenuse-Side)

Valid congruence rules are: SAS (two sides and included angle), ASA (two angles and included side), AAS (two angles and any side), RHS (for right triangles), and SSS (all three sides). SSA is not a valid congruence rule because it can result in two different triangles with the same measurements.

2text answer

In triangle ABC, if AB = AC and angle B = 40°, find the measure of angle C.

3true false

Two right triangles have hypotenuses of 13 cm and one leg of 5 cm each. These triangles are congruent by RHS rule.

Show answer

True

The RHS (Right-Hypotenuse-Side) congruence rule states that if the hypotenuse and one side of a right triangle are equal to the hypotenuse and corresponding side of another right triangle, then the triangles are congruent. Since both triangles have the same hypotenuse (13 cm) and the same leg (5 cm), they are congruent by RHS rule.

4matching

Match the triangle types with their angle properties:

Show answer

Equilateral triangle - All angles are 60°

Equilateral triangle: All sides equal, so all angles equal 60°. Isosceles triangle: Two sides equal, so two angles equal. Right triangle: One angle is 90°. Scalene triangle: All sides different, so all angles different. This follows from the relationship between sides and angles in triangles.

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Frequently Asked Questions

What are the important topics in Triangles for Gujarat Board Class 9 Mathematics?
Triangles covers several key topics that are frequently asked in Gujarat Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Triangles — Gujarat Board Class 9 Mathematics?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Triangles?
There are 44 practice questions available for Triangles. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

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

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