The perimeter of ABC is 30 feet. AB=5x-7, BC=3x+1, AC=4x. List the angles of ABC in order from smallest to largest
A)

Question

The perimeter of ABC is 30 feet. AB=5x-7, BC=3x+1, AC=4x. List the angles of ABC in order from smallest to largest 
A) <A,<B,<C
B)<A,<C,<B
C)<C,<B,<A
D)<C,<A,<B

joannablackwelder · Answer

Since the angle opposite a side  follow the same relative order as the length of the sides, we need to find the length of the sides. Use the idea that perimeter is the sum of all the lengths of the sides to set up an equation and solve for x.

joannablackwelder · Answer

Then plug x back into each side length to find the length of each side.

joannablackwelder · Answer

The the angle opposite a side must be the vertex that is not part of that side length. For example the angle opposite AB is <C.

nepurrta · Answer

It's D but thanks for trying to help. I knew how to do it I was just trying to save myself the headache.

joannablackwelder · Answer

That is not the purpose of this site.

e.mccormick · Answer

@nepurrta Read this if you are wondering what JoannaBlackwelder is talking about. http://openstudy.com/study#/updates/52682b59e4b029b030dbdc7e