What is the difference between lcf and gcf

Which best explains why this triangle is or is not a right triangle?

Acaterpillar eats 1400\%1400% of its birth mass in one day. the caterpillar's birth mass is mm grams. which of the following expressions could represent the amount, in grams, the caterpillar eats in one day? \

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect