My girlfriend is re-learning geometry. She has noticed that the sum of the angles of a triangle is equal to the measure of a straight angle and half the measure of a full revolution. She wants me to ask if there is any special relationship between a triangle and a straight angle or between a triangle and a circle that accounts for these similarities. I have no idea what to tell her, as I've never even thought of this sort of question before.(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Relationship Between Triangles and Straight Angles

**Physics Forums | Science Articles, Homework Help, Discussion**