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) |
| 1760 cm |
Advertisements
उत्तर
Given: Circumference C = 1760 cm
2πr = 1760
`2 xx 22/7 xx "r"` = 1760
r = `(1760 xx 7)/(2 xx 22)`
= `(160 xx 7)/(2 xx 2)`
= 40 × 7
= 280 cm
diameter = 2 × r
= 2 × 280
= 560 cm
Tabulating the results
| radius (r) | diameter (d) | Circumference (C) |
| 280 cm | 560 cm | 1760 cm |
APPEARS IN
संबंधित प्रश्न
From a point T outside a circle of centre O, tangents TP and TQ are drawn to the circle. Prove that OT is the right bisector of line segment PQ.
Prove that the line segment joining the points of contact of two parallel tangents of a circle, passes through its centre.
Fill in the blanks:
The centre of a circle lies in ____________ of the circle.
Fill in the blanks:
A circle divides the plane, on which it lies, in __________ parts.
A chord PQ of a circle of radius 10 cm substends an angle of 60° at the centre of circle. Find the area of major and minor segments of the circle.
In the given figure, PO⊥QO. The tangents to the circle at P and Q intersect at a point T. Prove that PQ and OT are right bisector of each other.
In the given figure, an isosceles triangle ABC, with AB = AC, circumscribes a circle. Prove that point of contact P bisects the base BC.
In the given figure, O is the centre of a circle. PT and PQ are tangents to the circle from an external point P. If ∠TPQ = 70° , find the ∠TRQ.
In the given figure, two tangents RQ, and RP and RP are drawn from an external point R to the circle with centre O. If ∠PRQ =120° , then prove that OR = PR + RQ.
In Fig. 4, a circle inscribed in triangle ABC touches its sides AB, BC and AC at points D, E and F respectively. If AB = 12 cm, BC = 8 cm and AC = 10 cm, then find the lengths of AD, BE and CF.
An equilateral triangle ABC is inscribed in a circle with centre O. The measures of ∠BOCis
In the given figure, OQ : PQ = 3.4 and perimeter of Δ POQ = 60 cm. Determine PQ, QR and OP.
Find the length of the chord of a circle in the following when:
Radius is 13 cm and the distance from the centre is 12 cm
ABC is a right triangle in which ∠B = 90°. If AB = 8 cm and BC = 6 cm, find the diameter of the circle inscribed in the triangle.
Draw circle with diameter: 8.4 cm
In above case, measure the length of the radius of the circle drawn.
Twice the radius is ________________
In the figure, a circle with center P touches the semicircle at points Q and C having center O. If diameter AB = 10, AC = 6, then find the radius x of the smaller circle.
If the radii of two concentric circles are 4 cm and 5 cm, then the length of each chord of one circle which is tangent to the other circle 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, ∠ADC = 130° and chord BC = chord BE. Find ∠CBE.
