We first have to find the area of the rectangular fabric:
A = (18) * (10) = 180cm ^ 2
The number of triangular patches cut from the fabric is:
n = (180) / (45) = 4
As there are 32 pieces of fabric then:
n '= 4 * (32) = 128
answer:
She cans cut from the 32 pieces up the fabric:
128 triangular patches with an area of 45 square centimeters