Question

A groundskeeper is tasked with fertilizing the grass of a triangular courtyard. To determine how much fertilizer he should buy, he must know the area of the courtyard. The owner informs the groundskeeper that the base of the courtyard is

Answer 1

square root shows up
step 1
[ 10 + sqrt(3) ] * 1/2 = 5 + 1/2sqrt(3)


sqrt(90) = sqrt( 3 * 3 * 10) = 3 sqrt(10)
hope this helps : P


step 2
multiply both above together:
3sqrt(10) * [ 5 + 1/2sqrt(3) ] = 15 sqrt(10) + 3/2sqrt(30)