Advertisements
Advertisements
प्रश्न
Find the missing values in the following table for the circles with radius (r), diameter (d) and Circumference (C).
| radius (r) | diameter (d) | Circumference (C) |
| 24 m |
Advertisements
उत्तर
Given: diameter d = 24 m
radius r = `"d"/2`
= `24/2`
= 12 m
Circumference C = 2πr units
= `2 xx 22/7 xx 12`
= `528/7`
= 75.4 m
Tabulating the results
| radius (r) | diameter (d) | Circumference (C) |
| 12 m | 24 m | 75.42 m |
APPEARS IN
संबंधित प्रश्न
In fig., O is the centre of the circle, PA and PB are tangent segments. Show that the quadrilateral AOBP is cyclic.
Fill in the blank
Circles having the same centre and different radii are called ...........................circles.
In the given figure ABC is an isosceles triangle and O is the centre of its circumcircle. Prove that AP bisects angle BPC .

Two concentric circles are of radii 6.5 cm and 2.5 cm. Find the length of the chord of the larger circle which touches the smaller circle.
In the given figure, PA and PB are two tangents drawn from an external point P to a circle with centre C and radius 4 cm. If PA ⊥ PB, then the length of each tangent is ______.

A chord of a circle of radius 14 cm subtends an angle of 120° at the centre. Find the area of the corresponding minor segment of the circle. `[User pi22/7 and sqrt3=1.73]`
In the given figure, if chords AB and CD of the circle intersect each other at right angles, then x + y =
In the given figure, O is the centre of the circle and ∠BDC = 42°. The measure of ∠ACB is

In the given figure, BDC is a tangent to the given circle at point D such that BD = 30 cm and CD = 7 cm. The other tangents BE and CF are drawn respectively from B and C to the circle and meet when produced at A making BAC a right angle triangle. Calculate (i) AF

A triangle PQR is drawn to circumscribe a circle of radius 8 cm such that the segments QT and TR, into which QR is divided by the point of contact T, are of lengths 14 cm and 16 cm respectively. If area of ∆PQR is 336 cm2, find the sides PQ and PR.
Draw a circle of radius of 4.2 cm. Mark its center as O. Takes a point A on the circumference of the circle. Join AO and extend it till it meets point B on the circumference of the circle,
(i) Measure the length of AB.
(ii) Assign a special name to AB.
A line segment which joins any two points on a circle is a ___________
In the adjoining figure, Δ ABC is circumscribing a circle. Then, the length of BC is ______

A point P is 10 cm from the center of a circle. The length of the tangent drawn from P to the circle is 8 cm. The radius of the circle is equal to ______
In the following figure, if ∠DAB = 60º, ∠ABD = 50º, then ∠ACB is equal to ______.

In the following figure, ∠AOB = 90º and ∠ABC = 30º, then ∠CAO is equal to ______.

A circle of radius 3 cm can be drawn through two points A, B such that AB = 6 cm.
A quadrilateral ABCD is inscribed in a circle such that AB is a diameter and ∠ADC = 130º. Find ∠BAC.
From the figure, identify two points in the interior.

Find the length of the arc of a circle which subtends an angle of 60° at the centre of the circle of radius 42 cm.
