the parking lots elevation is 400.14 feet. the buildings fin floor elevation is 401'-6 1/4. the path from the parking lot to the building is 30' long. if the grade is greater than 5%, then a hand rail will be required. will we have to install a handrail?

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

Set up a system of equations