In Figure, calculate the measure of `/_A O Cdot`

In a cyclic square ABCD, twice the measure of /_A is thrice the measure of /_C . Find the measure of /_C .

In Figure,lines AB,CD and EF intersect at O.Find the measures of /_AOC,/_COF,/_DOE and /_BOF

In figure, determine the measure of angleQSR, where O I the centre of the circle.

/_A is an obtuse angle. The measure of /_A and twice its supplementary differ by 30^0dot Then, /_A can be (a) ( b ) (c) (d) (e) 150^(( f )0( g ))( h ) (i) (j) (b) ( k ) (l) (m) (n) 110^(( o )0( p ))( q ) (r) (s) (c) ( d ) (e) (f) (g) 140^(( h )0( i ))( j ) (k) (l) (d) ( m ) (n) (o) (p) 120^(( q )0( r ))( s ) (t) (u)

In Figure, A O B is a straight line. If /_A O C+/_B O D=85^0, then /_C O D= (a)85^0 (b) 90^0 (c) 95^0 (d) 100^0

In Figure,O is the centre of the circle and the measure of arc ABC is 100^(@). Determine /_ADC and /_ABC

In a parallelogram A B C D , if /_D=115^0, then write the measure of /_A