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Circles

ICSE · Class 6 · Mathematics

Flashcards for Circles — ICSE Class 6 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.

139 questions30 flashcards4 concepts

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30 Flashcards
Card 1Diameter and Radius

If the radius of a circle is 6 cm, what is its diameter?

Answer

Step 1: Use the formula — Diameter = 2 × Radius. Step 2: Substitute the value — Diameter = 2 × 6 = 12 cm. Answer: 12 cm.

Card 2Diameter and Radius

The diameter of a circle is 14 cm. Find its radius.

Answer

Step 1: Use the formula — Radius = Diameter ÷ 2. Step 2: Substitute the value — Radius = 14 ÷ 2 = 7 cm. Answer: 7 cm.

Card 3Chord and Diameter

A circle has a radius of 5 cm. What is the length of its longest chord?

Answer

Step 1: The longest chord of a circle is its diameter. Step 2: Diameter = 2 × Radius = 2 × 5 = 10 cm. Answer: 10 cm.

Card 4Interior and Exterior of a Circle

Draw a circle with center O. Mark points A, B, and C such that OA = 4 cm, OB = 4 cm, and OC = 6 cm. Which point lies outside the circle?

Answer

Step 1: The radius is 4 cm (since OA and OB are equal to radius). Step 2: OC = 6 cm > 4 cm, so point C lies outside the circle. Answer: Point C lies outside.

Card 5Radius

If a circle's diameter is 10 cm, what is the length from the center to any point on the circumference?

Answer

Step 1: The distance from the center to any point on the circumference is the radius. Step 2: Radius = Diameter ÷ 2 = 10 ÷ 2 = 5 cm. Answer: 5 cm.

Card 6Interior and Exterior of a Circle

A circle has a radius of 8 cm. A point P is 7 cm away from the center. Where does point P lie?

Answer

Step 1: Compare the distance with the radius. Step 2: 7 cm < 8 cm, so point P lies inside the circle. Answer: Inside the circle.

Card 7Diameter and Radius

A line segment AB joins two points on a circle and passes through the center. If AB = 12 cm, what is the radius?

Answer

Step 1: Since AB passes through the center, it is a diameter. Step 2: Radius = Diameter ÷ 2 = 12 ÷ 2 = 6 cm. Answer: 6 cm.

Card 8Key Formulas

What is the formula for the diameter of a circle in terms of radius?

Answer

Formula: Diameter = 2 × Radius. Example: If radius = 9 cm, then Diameter = 2 × 9 = 18 cm.

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Frequently Asked Questions

What are the important topics in Circles for ICSE Class 6 Mathematics?
Circles covers several key topics that are frequently asked in ICSE Class 6 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Circles — ICSE Class 6 Mathematics?
Understand the core concepts first, then work through the 139 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many flashcards are available for Circles?
There are 30 flashcards for Circles covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

Sources & Official References

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

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