Question

What do I have to do here?
Given: VU tangent. PV, PU Secents.
https://media.glynlyon.com/a_matgeo_2011/6/group180.gif
If VU = 80° and ST = 40°, then Angle 1 =

Answer 1

angle 2 is the average of the 2 arcs
angle 1 is 1/2 the difference of the 2 arcs

Answer 2

I remember a little that i have to subtract 40 from 80, and then i dont remember what to do after that @phi

Answer 3

angle 1 is 1/2 the difference of the 2 arcs

Answer 4

one half of the difference

first find the difference (big arc minus little arc)
find half of that

Answer 5

40

Answer 6

and then what @phi

Answer 7

find half of that

Answer 8

40/2 is ?

Answer 9

20 @phi

Answer 10

that is the answer