Advertisements
Advertisements
प्रश्न
If O is the centre of the circle, find the value of x in each of the following figures
उत्तर
We have AOC = 135°
then COB = 180° - 135° = 45°
but x = `"COB"/2 = (45°)/2 = 22 1/2°`.
APPEARS IN
संबंधित प्रश्न
In fig. there are two concentric circles with Centre O of radii 5cm and 3cm. From an
external point P, tangents PA and PB are drawn to these circles if AP = 12cm, find the
tangent length of BP.
Fill in the blank:
An arc is a ................ when its ends are the ends of a diameter.
In Fig. 8.79, PQ is a tangent from an external point P to a circle with centre O and OP cuts the circle at T and QOR is a diameter. If ∠POR = 130° and S is a point on the circle, find ∠1 + ∠2.
The circle which passes through all the vertices of a triangle is called ______.
In the following figure, OABC is a square. A circle is drawn with O as centre which meets OC at P and OA at Q.
Prove that:
( i ) ΔOPA ≅ ΔOQC
( ii ) ΔBPC ≅ ΔBQA
Use the figure given below to fill in the blank:
Diameter of a circle is ______.
Use the figure given below to fill in the blank:
EF is a ______ of the circle.
Use the figure given below to fill in the blank:
AB is a ______ of the circle.
Draw a circle of any radius. Show one diameter, one radius and one chord on that circle.
What is the area of a semi-circle of diameter ‘d’?
