Find x. A. 22 B. 113–√ C. 222–√ D. 113√3

x = 31.12

Step-by-step explanation:

First find the base (hypotenuse) of the smaller triangle (the isosceles triangle):  Its three sides are 11, 11 and b.  b can be found using the Pythagorean Theorem:  b^2 = 11^2 + 11^2 = 242.  Then b = √242, or b = approximately 15.56.

b (which is approximately 15.56) is the shorter leg of the large (right) triangle.  The trig function needed to solve for x is the cosine:

                               adjacent side

cos 60 degrees =

                                  hypotenuse,

                                       15.56

which becomes (1/2) =

                                            x

Solving this for x, we get:  x = 2(15.56) = 31.12

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step-by-step explanation: