Janz is putting turf on a triangular portion of a garden around a circular fountain. If the turf costs $10 a square meter, how much will it cost Janz? Round to the nearest cent.

Question

anonymous · Answer

work out area of triangle, formula is half of the base length times the height of the triandle. then work out the area of the circle, formula is pi times the radius of the circle squared.  then subtract the circle are from the triangle area and you will have the area you want.  multiply final by $10 to get the total cost.  make sure you change all your lengths to metres before you work out the areas.