Question

1st Number....
Find the measure of angles​

Answer 1

Step-by-step explanation:

first asnwer

100°( angle on the circumference is half thr anglr at the centrle)

second answer

since OA=OB ( radius )

∆AoB is an isosceles ∆

i.e. 80+ <A+<B = 180

here <A=<B ( isosceles triangle)

therefore,

2<OAB= 180-80

<OAB= 50°