It is 140 degrees, as that is a line of 180 degrees, and we already have 40 in the acute angle.
Pretty sure its the 3rd one
It is a whole number, and is positive
Answer:
½ r² ∅
The area of a sector of a circle is ½ r² ∅, where r is the radius and ∅ the angle in radians subtended by the arc at the centre of the circle. So in the below diagram, the shaded area is equal to ½ r² ∅ .
Step-by-step explanation: