Question

find the size of unknown angles of the circle. plz kindly help . if you don't know answer don't leave any comment.​

Answer 1

Answer:

C) x=110

EXT ANG(AOB) = 360-140

=220

now by theorm [●]( will use to represent this theorm also it is stated in ncert)

angle at centre is double af that of the arc (in my simple language)

2x = 220

x=110

D) x= 62

triangle OPR

2×28+POR=180 (PRO=RPO AS OP=OR BCOZ RADII)(■)

POR= 124

by ●

2x=124

x=62

g) x=50

by ■●

180-2x=2×40

90-x=40

x=50

h)x= 220

by●

x=2(180-70)

x=2×110

x=220

k)x=78

y=39(●)

l) x=52

y=104

by ASP

y= 180-2(38)

y=104

180-y=180-2x

y=2x

x= 52

o)x=8.75

y=81.25

join OQ

BY●

2( 180-2y)=35

90-y=35/4

y=81.25

x+y=90

x=8.75

p)x=25

y=25

by ●

x=y

by ■

2(y+65)=180

y+65=90

y=25=x