Question

Given: Line DR tangent to Circle O.

If m Arch DB = 150°, then Angle A =
a) 75
b) 105
c) 150

Answer 1

https://suwannee.owschools.com/media/g_geo_2013/7/group179.gif

Answer 2

@Dan815

Answer 3

@Dan815

Answer 4

@SolomonZelman

Answer 5

Please somebody help

Answer 6

:(

Answer 7

Will Medal If answered!

Answer 8

arc DB is 150. any idea what arc BD (the long way ) is ?
(notice together DB + BD is all the way round the circle)

Answer 9

Yeah and a circle is 360 degrees

Answer 10

So BD is 210 right?

Answer 11

But what about angle A?

Answer 12

yes. now use the idea that angle A is an inscribed angle