​Objective and Standards

• ​Students will be able to identify diagonals, calculate interior angles, calculate exterior angles, and classify polygons.

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MA.912.GR.1.4

Prove relationships and theorems about parallelograms. Solve mathematical and real-world problems involving postulates, relationships, and theorems of parallelograms.

​Vocabulary

In a polygon:

• ​Consecutive vertices are two vertices that are endpoints of the same side.

• A diagonal is a segment that joins two nonconsecutive vertices.​

​Classifying polygons

​Classifying Polygons (review from 1.4)