How many acute angles does an obtuse triangle have?
In the above diagram, and lie on a straight line. If which of the following is true of ?
Angles and are adjacent with common vertex and common edge If and which of the following is true of
If is an acute angle, is a right angle and is an obtuse angle, which of the following is true of
In the above diagram, , , and lie on a straight line. Which of the following is true of angle ?