Lynn worked as a time keeper at a track meet the following table list the time in seconds for two groups in the 400 meter semifinals Group 1 Group 2
55 56
68 58
64 59
66 61
70 57

How many seconds were the runners in group 2 than group 1?
A-1
B-5
C-6
D-13
E-15

The answer of the above is

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .