10.
如图,AB∥CD,点E在BC上,∠D=64°,∠DEB=108°,则∠B的度数为( )
| A. | 64° | B. | 44° | C. | 32° | D. | 54° |
9.|-6|的相反数是( )
| A. | -6 | B. | 6 | C. | -$\frac{1}{6}$ | D. | $\frac{1}{6}$ |
7.正六边形的边心距是$\sqrt{3}$,则它的边长是( )
| A. | $\frac{\sqrt{3}}{3}$ | B. | 2 | C. | $\sqrt{3}$ | D. | $\frac{2}{3}$$\sqrt{3}$ |
6.tan30°的结果等于( )
0 284069 284077 284083 284087 284093 284095 284099 284105 284107 284113 284119 284123 284125 284129 284135 284137 284143 284147 284149 284153 284155 284159 284161 284163 284164 284165 284167 284168 284169 284171 284173 284177 284179 284183 284185 284189 284195 284197 284203 284207 284209 284213 284219 284225 284227 284233 284237 284239 284245 284249 284255 284263 366461
| A. | $\frac{\sqrt{2}}{2}$ | B. | $\frac{\sqrt{3}}{2}$ | C. | $\frac{\sqrt{3}}{3}$ | D. | $\frac{1}{2}$ |