Triangle exploration

1) The document describes an exploration activity where students measure and label the angles of different triangles, cut them into pieces, and rearrange the pieces so that the corners are touching. This demonstrates that the sum of the interior angles of a triangle is always 180 degrees. 2) It asks students to find the measure of missing angles in different triangles using the fact that the interior angles sum to 180 degrees. For example, if we know two angles are 80 degrees and 40 degrees, the missing angle must be 60 degrees. 3) The activity reinforces the key properties of triangles and having students practice applying properties like finding missing angles.