What is the sum of the interior angles of the polygon pictured below?

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab