2. Geometry Mini-Lesson
Tuesday, May 14, 2019
Tony is drawing a regular polygon. He has drawn two of the sides with an interior angle of 120°, as shown below. How many sides will the regular polygon have when Tony completes his drawing? 6 7 8 9
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

3. Geometry Mini-Lesson
Tuesday, May 14, 2019
John is drawing a regular polygon. He has drawn two sides with an exterior angle measure of 45°, as shown. When John completes his regular polygon, what will be the sum, in degrees, of the measures of the interior angles?
Gridded Response Correct Answer: 1080
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

4. Geometry Mini-Lesson
Tuesday, May 14, 2019
Mindy is drawing a regular polygon. She has drawn two sides with an exterior angle measure of 36°, as shown below. When she completes her regular polygon, what will be the sum, in degrees, of the measures of the interior angles?
Gridded Response Correct Answer: 1440
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

5. Geometry Mini-Lesson
Tuesday, May 14, 2019
Sonja is drawing a regular polygon. She has drawn two of the sides with an interior angle of 150°, as shown. How many sides will the regular polygon have when Sonja completes her drawing? 10 11 12 13
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

6. 42° 64° 117° 126° Geometry Mini-Lesson
Tuesday, May 14, 2019
Review the triangle below. What is the measure of the exterior angle shown?
42°
64°
117°
126°
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

7. Geometry Mini-Lesson 45° 81° 99° 137°
Tuesday, May 14, 2019
In the pentagon below, what is the measure of the exterior angle shown?
45°
81°
99°
137°
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

8. Geometry Mini-Lesson
Tuesday, May 14, 2019
Find the value of x in the pentagon below. 18
18.9
19.6 20
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

9. Geometry Mini-Lesson
Tuesday, May 14, 2019
Find the value of x in the octagon below. 34 36 57 69
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

10. Geometry Mini-Lesson
Tuesday, May 14, 2019
A regular pentagon and a regular hexagon share a vertex, as shown below. What is the value of x, in degrees?
Gridded Response Correct Answer: 13
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used

11. Geometry Mini-Lesson
Tuesday, May 14, 2019
A regular pentagon shares each of its sides with an equilateral triangle, as shown. What is the value of x, in degrees?
Gridded Response Correct Answer: 132
MA.912.G.2.2: Determine the measures of interior and exterior angles of polygons, justifying the method used