MCQ
If $r$ is the radius of a circle, then it's circumference is given by :
- ✓$2\pi\text{r}$
- B$\pi\text{r}$
- C$2\pi\text{d}$
- DNone of these
✓
Answer
Correct option: A.
$2\pi\text{r}$
If the radius of a circle is given, the circumference or perimeter can be calculated using the formula below :
Circumference $= 2\pi\text{r}$
Circumference $= 2\pi\text{r}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
If the point $(k, 0)$ divides the line segment joining the points $A(2,-2)$ and $B(-7,4)$ is the ratio $1: 2$, then the value of $k$ is
→the lengths of the diagonals of a rhombus are $24\ cm$ and $10\ cm.$ The length of each side of the rhombus is:
→In the given figure, $AB$ and $AC$ are tangents to a circle with centre $O$ and radius $8\ cm$. If $OA = 17\ cm,$ then the length of $AC ($in $\ cm)$ is :
→8 chairs and 5 tables cost ₹$10,500$, while 5 chairs and 3 tables cost ₹$6,450$. The cost of each chair will be
→A girl calculates that the probability of her winning the first prize in a lottery is 0.06. If 8000 tickets are sold, then how many tickets has she bought?
In $\triangle A B C, P Q \| B C$. If $P B=6 cm, A P=4 cm, A Q=8 cm$, then the length of $A C$ is
→A box contains $3$ blue, $2$ white and $4$ red marbles. If a marble is drawn at random from the box, what is the probability that it will not be a white marble?
→The next term of the $\text{AP}\sqrt{7},\sqrt{28},\sqrt{63},\ ...$ is :
→If points $(t, 2 t),(-2,6)$ and $(3,1)$ are collinear, then $t=$
→The surface area of a cube is $216 cm^2$,its volume is
→