A 12 ​-foot ladder is leaning against a building with the base of the ladder 5 feet from the building. How can you find how high on the building the top of the ladder will​ reach? Find how far up the building the top of the ladder will reach.

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)

so 75 people in the room, 3 more enter so

75 + 3 = 78 so then 2 leave so

75 + 3 = 78 - 2 = 76

then since im not sure what beat up means but im guessing they stayed because it doesnt sya they left so

hope i have a great day!