Answer:
or 
Step-by-step explanation:
Given


Required
Calculate the area of the sector
When angle is given in degrees, the area of sector is calculated as thus;


becomes






The above is the area in terms of π
Solving further.... (Take π as 3.14)
becomes


Hence, the area of the sector is
or 
Answer:
ab and cd intersect at E because they are vertically opposite angles they always intersect at a point
In order to add fractions you need to change the denominators to make sure they are the same. Then, all you have to do is add the two numerators like normal and keep the denominator the same.
Hope this helps!!!! :D