How many times can 40 fit into 30

not even once

Step-by-step explanation:

A number must be smaller than the number u want to fit it into.

But, if u divide 40 by 30, you get 1.33333333333333333333forever.

Hope this helps!!

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.