Question

In the figure nearby, chord AC and chord DE
intersect each other in point B.
i. If m(arc AE) = 50, m( arc DC) = 140,
then < DBC = ? < ABD = ?
ii. If m(arc AD) =70, m< EBC = 50, then
m(arc EC)= ? ​​

Answer 1

Step-by-step explanation:

In a circle angle subtended by any chord on opposite sides are supplementary.

So m(arcAPC)+m(arcABC)=180o

So m(arcABC)=180o−60o=120o