1.

The ratio of the angles of a triangle is 1 : 2 : 3 .Then the smallest angle is :3

A. <table><tr><td rowspan="2"> 21 </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4 </center></td></tr><tr><td style="text-align: center;">7</td></tr></table>
B. 25
C. <table><tr><td rowspan="2"> 25 </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5 </center></td></tr><tr><td style="text-align: center;">7</td></tr></table>
D. <table><tr><td rowspan="2"> 38 </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4 </center></td></tr><tr><td style="text-align: center;">7</td></tr></table>
E.
Answer» D. <table><tr><td rowspan="2"> 38 </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4 </center></td></tr><tr><td style="text-align: center;">7</td></tr></table>


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