Advertisements
Advertisements
Question
Fill in the blank
Circles having the same centre and different radii are called ...........................circles.
Advertisements
Solution
Circles having the same centre and different radii are called Concentric circles.
APPEARS IN
RELATED QUESTIONS
A chord of a circle of radius 10 em subtends a right angle at its centre. The length of the chord (in em) is
`(A) 5sqrt 2`
`(B) 10 sqrt2`
`(C)5/sqrt2`
`(D) 10sqrt 3`
In two concentric circles, prove that all chords of the outer circle which touch the inner circle are of equal length.
If AB, AC, PQ are tangents in Fig. and AB = 5cm find the perimeter of ΔAPQ.
In Fig 2, a circle touches the side DF of ΔEDF at H and touches ED and EF produced at K and M respectively. If EK = 9 cm, then the perimeter of ΔEDF (in cm) is:
If the area of a circle is equal to sum of the areas of two circles of diameters 10 cm and 24 cm, then the diameter of the larger circle (in cm) is:
The greatest chord of a circle is called its
Draw a circle of radius 6 cm. In the circle, draw a chord AB = 6 cm.
(i) If O is the center of the circle, join OA and OB.
(ii) Assign a special name to ∆AOB
(iii) Write the measure of angle AOB.
In the given figure, AB is the diameter of the circle. Find the value of ∠ACD.
The length of tangent from an external point on a circle is always greater than the radius of the circle.
In the following figure, if ∠OAB = 40º, then ∠ACB is equal to ______.
