Quantitative section of GMAT Exam consists of total 37 questions. The time allotted for this section is 75 minutes. There are two main question types:
Circle is the first geometric figure which we started playing with even before we knew the concepts of geometry.
What is a Circle?
A set of points, placed at equal distance from some fixed point, is known as a circle.
The fixed point is known as a circle.
So, let’s understand some concepts related to circle:
Any segment of line that has its end points on the circle.
A chord passing through center is known as a diameter.
A radius is a line segment whose one end point lies at the center while other lies on the circle.
Formulas related to circle:
Area of circle is equal to:
Perimeter of circle is:
Where, r is radius and d is diameter.
Let’s solve a question to get a better grasp at the concept:
What is the diameter of the circle which circumscribes a triangle with sides 9-40-41 cm?
As, 9-40-41 is a Pythagorean triplet. So, the hypotenuse of the triangle will be the diameter of the circle.
So, Diameter = 41 cm.
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