What is the sum of the measures of the interior angles of any triangle?
The measures add to $\editable{}$ °
Consider the diagram below.
Use definitions and theorems about lines and angles to solve problems and to justify relationships in geometric figures.
Use definitions and theorems about triangles to solve problems and to justify relationships in geometric figures.
Make sense of problems and persevere in solving them.
Construct viable arguments and critique the reasoning of others.
Model with mathematics.
Attend to precision.
Look for and make use of structure.