It took mary lou 5/6 hour to write a report for english class. it took heather 9/10 as much time to write her report as it took mary lou. who took longer?

So, Mary Lou took of an hour, that is

Heather took as much time as Mary Lou, so she took of 50 minutes, that is

45 minutes is less than 50, so Heather was faster and Mary Lou was slower and took longer!

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.