In a triangle, the ratio of two angles is 7:2, and the third angle is the difference between the first two angles. What is the smallest angle, in degrees? Pick:
A) 90/11
B) 120/7
C) 150/11
D) 180/7
E) 25
the three angles are 7x, 2x, and (7x-2x)=5x for some value x (to create the ratio)   the three angles of a triangle add up to 180, so 7x+2x+5x   (7 -2 )= 
<gadget id="calculator">  (7 -2 )</gadget>
<output>5</output>
5x for some value x (to create the ratio)   the three angles of a triangle add up to 180, so 7x+2x+5x= 180   14x = 180   x=180/14   x = 90/7   the smallest angle is 2x = 2*(90/7) = 180/7   180/7
<result>D</result>
In a triangle, the ratio of two angles is 7:2, and the third angle is the difference between the first two angles. What is the smallest angle, in degrees?