Can someone help??? I need a problem of linear functions, it doesn't need to be really hard (and please write the answer of the problem)

1. what is the measure of ∠abc? what is the measure of ∠abd?

What properties allow transformation to be used as a problem solving tool

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2