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Geometry: Fundamental Concept — Flashcards

ICSE · Class 6 · Mathematics

30 flashcards for Geometry: Fundamental Concept (ICSE Class 6 Mathematics) to test yourself on key terms and facts.

131 questions30 flashcards5 formulas & key relations4 concepts

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30 Flashcards·
Complementary AnglesVertically Opposite AnglesSupplementary AnglesAngles on a Straight LineLinear Pair of Angles
Card 1Complementary Angles

What is the measure of the complement of a 35° angle?

Answer

Step 1: Complementary angles add up to 90°. Step 2: Subtract the given angle from 90°. 90° – 35° = 55°. Answer: 55°…

Card 2Vertically Opposite Angles

If two lines intersect and one angle is 40°, what is the measure of its vertically opposite angle?

Answer

Vertically opposite angles are always equal. So, if one angle is 40°, its vertically opposite angle is also 40°. Answer: 40°…

Card 3Complementary Angles

Two complementary angles are in the ratio 2:3. Find the angles.

Answer

Step 1: Let the angles be 2x and 3x. Step 2: Since they are complementary, 2x + 3x = 90° → 5x = 90° → x = 18°. Step 3: 2x = 36°, 3x = 54°. Answer: 36° and 54°…

Card 4Supplementary Angles

An angle measures 110°. What is its supplement?

Answer

Step 1: Supplementary angles add up to 180°. Step 2: Subtract the given angle from 180°. 180° – 110° = 70°. Answer: 70°…

Card 5Supplementary Angles

Two supplementary angles are in the ratio 4:5. Find the angles.

Answer

Step 1: Let the angles be 4x and 5x. Step 2: Since they are supplementary, 4x + 5x = 180° → 9x = 180° → x = 20°. Step 3: 4x = 80°, 5x = 100°. Answer: 80° and 100°…

Card 6Angles on a Straight Line

In the figure, AOB is a straight line. If ∠AOC = 60° and ∠COB = x, find x.

Answer

Step 1: AOB is a straight line → ∠AOB = 180°. Step 2: ∠AOC + ∠COB = 180° → 60° + x = 180°. Step 3: x = 180° – 60° = 120°. Answer: 120°…

Card 7Linear Pair of Angles

If two adjacent angles form a linear pair and one is 75°, what is the other?

Answer

Step 1: Linear pair means the sum is 180°. Step 2: 180° – 75° = 105°. Answer: 105°…

Card 8Complementary Angles

An angle is equal to its complement. What is its measure?

Answer

Step 1: Let the angle be x. Then, x + x = 90° → 2x = 90° → x = 45°. Answer: 45°…

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Frequently Asked Questions

What are the important topics in Geometry: Fundamental Concept for ICSE Class 6 Mathematics?
Key topics in Geometry: Fundamental Concept include Basic Geometrical Elements, Angles and Their Types, Special Angle Pairs. Study these first, then practise questions on each for Class 6 exams.
How many flashcards are available for Geometry: Fundamental Concept?
There are 30 flashcards for Geometry: Fundamental Concept covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Geometry: Fundamental Concept for Class 6 exams?
Learn the core ideas first, then work through the 131 practice questions on Geometry: Fundamental Concept. Revise 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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