求职GWD12-8,22

Q8: In the figure shown, the triangle is inscribed in the semicircle.  If the length of line segment AB is 8 and the length of line segment BC is 6, what is the length of arc ABC?

A.  15p

B.  12p

C.  10p

D.  7p

E.  5p

图是一个圆被AC一条线截了，圆上有一个点B，ABC都在圆上。因看不懂题目，也不知该如何求解，求助大牛！

             A

What is the volume of the cube above?

(1)
                        The surface area of the cube is 600 square inches.

(2)      The length of diagonal AB is 10√3 inches.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

                                                                              Answer:

AB是最长的对角线。记得以前学过，可是现在又忘了。谁能告诉我知道表面积怎么就可以求V了呢？还有，如果知道对角线了呢？

忘大牛指点！