Use the diagram below. Is the statement true? Explain.
What should you look for in the diagram?
For part (A), check whether the angle pair matches every part of the definition of adjacent angles.
No. They have a common side
No.
Yes.
There are some relationships you can assume to be true from a diagram that has no marks or measures. There are other relationships you cannot assume directly. For example, you can conclude the following from an unmarked diagram.
You cannot conclude the following from an unmarked diagram.