I need help with the perimeter ASAP! The floor of a small bedroom is made up of 140 square tiles. Each tile measures 20cm on the side.

how large is the floor area of ​​the bedroom?

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.

dd

step-by-step explanation:

dd

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

brainliest lol i just need one more brainliest.