Q. 14 A54.5( 6 Votes )

# In cyclic quardrilateral ABCD, if ∠a=120°, then the circular of ∠C is

A.

B.

C.

D.

Answer :

The sum of opposite angle in a cyclic quadrilateral = π

Converting 120° to cyclic

Rate this question :

Let us write whether the following statements are true or false:

(i) The angle, formed by rotating a ray centering its end point in anticlockwise direction is positive.

(ii) The angle, formed for completely rotating a ray twice by centering its end point is 720°

West Bengal Board - MathematicsI have drawn an isosceles triangle ABC whose included angle of two equal sides is ∠ABC=45°; the bisector of ∠ABC intersects the side AC at the point D let us determine the circular values of ∠ABD, ∠BAD, ∠CBD and ∠BCD.

West Bengal Board - MathematicsThe base BC of the equilateral triangle ABC is extended upto the point E so that CE=BC. By joining A,E, let us determine the circular values of the angles of ΔABC

West Bengal Board - MathematicsIn ΔABC, AC=BC and BC is extended upto the point D. If ∠ACD=144°, then let us determine the circular value of each of the angles of ΔABC.

West Bengal Board - MathematicsIn a circle, if an arc of 220 cm. length subtends an angle of measure 63° at the centre, then let us determine the radius of the circle.

West Bengal Board - MathematicsA rotating ray makes an angle π. Let us write by calculating, in which direction the ray has completely rotate and there after what more angle it has produced.

West Bengal Board - MathematicsLet us fill in the blanks:

(i) π radian is a ______angle.

(ii) In sexagesimal system 1 radian equals to ______(approx)

(iii) The circular value of the supplementary angle of the measure is_____

West Bengal Board - Mathematicsradian equals to

West Bengal Board - MathematicsIn cyclic quardrilateral ABCD, if ∠a=120°, then the circular of ∠C is

West Bengal Board - MathematicsThe circular value of each internal angle of a regular hexagon is

West Bengal Board - Mathematics