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Angles in Polygons Worksheet (Unit 13) 1. The interior angles of which sign have a sum of 360°? 2. The interior angles of which sign have a sum of 540°? 3. What is the sum of the interior angles of a stop sign? 4. If a yield sign is a regular polygon, what is the measure of each angle? 5. A triangle with 3 unequal sides is a scalene triangle. Scalene triangles also have 3 unequal angles. Which angles can form a scalene triangle? A. 50°, 60°, 65° C. 110°, 40°, 40° B. 50°, 60°, 70° D. 20°, 20°, 40° 6. What is the missing angle measure of a triangle with angles 62° and 72°? A. 52° C. 54° B. 34° D. 46° 7. A design on a belt shows a row of irregular pentagons. Inside each figure, two of the angles each measure 60°. Another angle measures 270°. If the remaining angles are equal, what are their measures? F. 60° each H. 75° each G. 120° each J. 150° each 8. On a door is a sign that says “Welcome To Our Home.” The sign is in the shape of a regular octagon. What is the measure of one of the interior angles of the sign? A. 135° C. 80° B. 65° D. 150° Angles in Polygons Worksheet (Unit 13) Use proportions to find the missing sides and angles. 9. 10. 11. 12.