Mr. Ohashi's Math 8 Website

Eighth Grade Math at Eckstein Middle School

Tuesday, 6/13: Equal Angles (Day 11 of 14)

Learning Target: Use angle relationships to determine unknown angle measures.
Handouts: Equal Angles (Turn in: Wed, 6/14)

Today we learned a few new symbols. The symbols drawn on the angles below show that the angles are equal in measure. Notice that in the parallelogram, one pair of angles is equal, but not equal to the other pair of angles.

If you have a regular polygon, all side lengths are equal and all angles are equal (like the pentagon below). We can actually find the measure of each of the interior angles using the interior angle sum formula. Since all of the angles are equal, divide the interior angle sum by the number of angles!

Third period should finish #1-8. Fourth & fifth period should finish #1-6. Don’t forget that we have a quiz on Friday!


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