Grade 11 Exam > Grade 11 Videos > Mathematics for Grade 11 > Quick Revision: Circles
Quick Revision: Circles Video Lecture | Mathematics for Grade 11
FAQs on Quick Revision: Circles Video Lecture - Mathematics for Grade 11
| 1. What is a circle in geometry? |  |
Ans. A circle in geometry is a closed curve where all points are equidistant from a fixed point called the center.
| 2. How do you find the circumference of a circle? | |
Ans. The circumference of a circle can be found using the formula: Circumference = 2 x π x radius.
| 3. What is the relationship between the radius and diameter of a circle? | |
Ans. The diameter of a circle is twice the length of its radius. In other words, Diameter = 2 x Radius.
| 4. How do you find the area of a circle? | |
Ans. The area of a circle can be calculated using the formula: Area = π x radius^2.
| 5. Can you find the radius of a circle if you know its circumference? | |
Ans. Yes, the radius of a circle can be found using the formula: Radius = Circumference / (2 x π).
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