The Polygon Angle-Sum Theorems

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The Polygon Angle-Sum Theorems

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The Polygon Angle-Sum Theorems

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Presentation transcript:

The Polygon Angle-Sum Theorems Lesson 3-5 Lesson Quiz For Exercises 1 and 2, if the figure is a polygon, name it by its vertices and identify its sides. If the figure is not a polygon, explain why not. 1. 2. 3. Find the sum of the measures of the angles in an octagon. 4. A pentagon has two right angles, a 100° angle and a 120° angle. What is the measure of its fifth angle? 5. Find m ABC. 6. XBC is an exterior angle at vertex B. Find m XBC. not a polygon because two sides intersect at a point other than endpoints quadrilateral ABCD; AB, BC, CD, DA 1080 140 ABCDEFGHIJ is a regular decagon. 144 36