Can somebody please answer this geometry crap?

Question

anonymous · Answer

it's # 22

calculusfunctions · Answer

First of all as a mathematician and a teacher, I am offended that you call it crap! Now let's proceed forward, shall we? In order to answer #22 you need to first solve #21. Have you?

anonymous · Answer

no. not exactly. MY teacher isn't all that great at explainig things and she has a thick accent so thats why im not fond of this subject. it's great when i understand it. anyways, bo i have not. give me just one minute.

anonymous · Answer

ok. i have discovered... that i have no idea how to solve #21 also.

anonymous · Answer

sorry. my computer is going nuts and it takes a while.

calculusfunctions · Answer

Sorry, I'm just busy. give me a second.

anonymous · Answer

thats totally fine! :)

calculusfunctions · Answer

OK Ready!

calculusfunctions · Answer

It is plausible to solve #22 without #21 but you should know how to solve it so lets do so. 

|dw:1351136176795:dw|

You have an Isosceles triangle where PQ = PR. You're told that the length of the base is 4/3 the length of each of the congruent sides. Correct? What do you think we should do first?