Question

Find x.

http://roads.advancedacademics.com/contentserver/content/roadssection/279450/questions/assessments/t-righttrianglespythagoreantheoremquiz/geometry_4.3_quiz_8q.gif

A. 9
B. 9√2
C. 4.5√2
D. 18v2

Answer 1

It's right there at the bottom! Where were you looking?

Answer 2

rude.

Answer 3

ok, well there is a special rule for 45 45 90 triangles.

or you could use the cosine function

Answer 4

can you help me figure that out, please?

Answer 5

There are two purposes for this problem:

1) See if you can ignore the triangle on the top. It is a superfluous smoke screen and does not help solve the problem.

2) See if you remember the relationships of the 45-45-90 right triangle.

It's just \(\dfrac{18}{\sqrt{2}}\). You may wish to "simplify".