Dear ttrottewood, please use panel for submitting new questions. Make sure you post the full condition.
The diagram shows a sector of a circle of radius r cm containing angle Ө radians. The area of the sector is A cm2 and the perimeter of the sector is 50 cm.
a. Find Ө in terms of r
b. Show that A = 25r – r2
Dear Real Expert,
Thank you for your remarks. Your are right. We corrected our answer according to your comment.
Bullshit. They are looking for AREA... not ARC LENGTH (if that's indeed what 'Expert' did). Not going to look over such rubbish. REAL answer = 78.93 square feet!