Home › CBSE Class 9 › Mathematics › Perimeter and Area › The circumference of a circle of diameter d is:
The circumference of a circle of diameter d is:
Api plus d
Bd divided pi
Cpi times d
Dtwo times d
Answer & Solution
Correct answer: C. pi times d
1. The C by D ratio is the same for every circle.
2. That ratio is called pi.
3. So the circumference is pi times the diameter.
4. The answer is pi times d.
_Source: NCERT Class 9 Mathematics, Ch 6 'Measuring Space: Perimeter and Area'_
Related questions
An arc's length depends on the angle it subtends at the:The length of a semicircle of radius r is:Which shapes are always cyclic?Who found a formula for the area of a cyclic quadrilateral?Heron's formula finds a triangle's area from its:Using Heron's formula, the area of the 3, 4, 5 triangle is:For a triangle of sides 3, 4 and 5, the semi-perimeter is:The semi-perimeter of a triangle is: