Jeremy was trying to find the sum of the measures of the angles in a triangle. He cut off all three angles on the dotted lines shown and then laid the angles vertices edge-to-edge. He observed that they formed a straight line. What does this mean?
Responses
A Nothing. A straight line has no measure.Nothing. A straight line has no measure.
B That the angles sum up to 180°.That the angles sum up to 180°.
C That the angles sum up to 270°.That the angles sum up to 270°.
D That the angles sum up to 90°.That the angles sum up to 90°.