Answer:
{121,144,169} X intersecting Y means common number between x and y set
I'm pretty sure it would be 4 20÷5=4
The length of each side is 28 cm.
the perimeter of the equilateral triangle is 48 cm. To find each side of the original triangle, you do 48/3=16cm. since the triangle dilate by 0.75, then you can just do 0.75*16=12cm. then you have to add 12 to 16 because the triangle gets bigger by 12 cm. so 16+12=28 cm.
0.25 or 1/4 as a fraction
