What are the steps and answer

Trust me it’s I disagree

Step-by-step explanation:

So you have to use the Pythagorean Theorum which is and in this case a is 70 and b is 40.

So if we plug those numbers in we have to square a and b and add them which is 6,500 and to find c we have to find the square root of 6500 which is about 80 so lines PR and QR are different

b

step-by-step explanation:

the word superfluous means unnecessary