Advertisements
Advertisements
प्रश्न
In the following figure, if ∠ABC = 20º, then ∠AOC is equal to ______.
पर्याय
20º
40º
60º
10º
Advertisements
उत्तर
In the following figure, if ∠ABC = 20º, then ∠AOC is equal to 40º.
Explanation:
Given: ∠ABC = 20°
By theorem “The angle subtended by an arc at the center of a circle is twice the angle subtended by it at remaining part of the circle”, we have:
∠AOC = 2 × ∠ABC
= 2 × 20°
= 40°
∴ ∠AOC = 40°
APPEARS IN
संबंधित प्रश्न
In the fig. ABC is right triangle right angled at B such that BC = 6cm and AB = 8cm. Find the radius of its in circle.
If ΔABC is isosceles with AB = AC and C (0, 2) is the in circle of the ΔABC touching BC at L, prove that L, bisects BC.
In the fig two tangents AB and AC are drawn to a circle O such that ∠BAC = 120°. Prove that OA = 2AB.
true or false
A circle is a plane figure.
In the given figure, PA and PB are the tangent segments to a circle with centre O. Show that the points A, O, B and P are concyclic.
The radius of a circle is 6 cm. The perpendicular distance from the centre of the circle to the chord which is 8 cm in length, is
The figure given below shows a circle with center O in which diameter AB bisects the chord CD at point E. If CE = ED = 8 cm and EB = 4 cm,
find the radius of the circle.
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.
Twice the radius is ________________
Find the diameter of the circle
Radius = 10 cm
