CAT Exam > CAT Videos > Crash Course for XAT > Geometry - 4: Circle
Geometry - 4: Circle Video Lecture | Crash Course for XAT - CAT
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FAQs on Geometry - 4: Circle Video Lecture - Crash Course for XAT - CAT
| 1. What is a circle in geometry? |  |
Ans. A circle in geometry is a shape that consists of all points in a plane that are equidistant from a fixed center point. It is defined by its radius, which is the distance from the center to any point on the circle.
| 2. How do you calculate the circumference of a circle? | |
Ans. The circumference of a circle can be calculated using the formula C = 2πr, where C represents the circumference and r represents the radius of the circle. Alternatively, the formula C = πd can also be used, where d represents the diameter of the circle.
| 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, if r is the radius of a circle, then the diameter can be calculated as d = 2r. Conversely, the radius can be calculated as r = d/2.
| 4. How do you find the area of a circle? | |
Ans. The area of a circle can be calculated using the formula A = πr², where A represents the area and r represents the radius of the circle. This formula is derived from dividing the circle into infinitesimally small sectors and summing their areas.
| 5. How is the circumference of a circle related to its diameter? | |
Ans. The circumference of a circle is directly proportional to its diameter. This means that the circumference is always equal to π times the diameter, regardless of the size of the circle. In other words, C = πd.
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Nov 18, 2024 Last updated |
Video Description: Geometry - 4: Circle for CAT 2024 is part of Crash Course for XAT preparation.
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