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Lines and Angles

Gujarat Board · Class 7 · Mathematics

Practice quiz for Lines and Angles — Gujarat Board Class 7 Mathematics. MCQs and questions with answers to test your preparation.

45 questions5 concepts

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Quick Quiz: Lines and Angles

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1

Two angles are complementary. One angle measures 35°. What is the measure of the other angle?

2

Two angles are supplementary. One angle measures 110°. What is the measure of the other angle?

3

What is the complement of a 48° angle?

4

What is the supplement of a 75° angle?

45 Questions·
multiple choice

Sample Questions

1multiple choice
1 marks

An angle is equal to its own complement. What is the measure of the angle?

Show answer

45°

Step 1: Let the angle be x. Its complement is also x. Step 2: x + x = 90° (complementary angles sum to 90°) Step 3: 2x = 90° Step 4: x = 45° Verification: 45° + 45° = 90° ✓

2multiple choice
1 marks

An angle is equal to its own supplement. What is the measure of the angle?

Show answer

90°

Step 1: Let the angle be x. Its supplement is also x. Step 2: x + x = 180° (supplementary angles sum to 180°) Step 3: 2x = 180° Step 4: x = 90° Verification: 90° + 90° = 180° ✓

3multiple choice
1 marks

Which of the following pairs of angles are complementary?

Show answer

40° and 50°

Step 1: Complementary angles must add up to 90°. Step 2: Check each pair: 40° + 50° = 90° ✓; 60° + 60° = 120° ✗; 90° + 90° = 180° ✗; 70° + 70° = 140° ✗ Step 3: Only 40° and 50° sum to 90°, so they are complementary. Verification: The definition of complementary angles requires the sum to be exactly 90°.

4multiple choice
1 marks

Which of the following pairs of angles are supplementary?

Show answer

120° and 60°

Step 1: Supplementary angles must add up to 180°. Step 2: Check each pair: 120° + 60° = 180° ✓; 90° + 90° = 180° ✓ — Wait, let's recheck option B: 90° + 90° = 180° which IS supplementary. However, option A is listed first. Both A and B are supplementary, but the intended answer here focuses on A since both work. Rechecking: 100°+70°=170° ✗; 45°+45°=90° ✗. Step 3: 120° + 60° = 180° confirms option A is correct.

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What are the important topics in Lines and Angles for Gujarat Board Class 7 Mathematics?
Key topics in Lines and Angles include Lines and Angles – Complete Chapter Overview, Lines and Angles – Complete Chapter Overview, Lines and Angles - Concept Overview. These are the concepts Gujarat Board Class 7 examiners draw on most — study them first, then practise related questions.
How to score full marks in Lines and Angles — Gujarat Board Class 7 Mathematics?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

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

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