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Answers

01) The interior angles are each 120°, so to find the exterior angles we could make an equation: 180° (straight line)  - 120° (interior angle) = 60° (measure of exterior angle) The exterior angles add up to 360°, so if we divide 360° by 60° (since each exterior angle is 60) we find there are 6 exterior angles. Therefore, there are 6 sides and it is a hexagon.

 

04) Starbucks, Batman, Mercedes, McDonalds. 

 

05) All equilateral triangles are isosceles because, under the respective criterion, a triangle must have AT LEAST 2 congruent sides to be isosceles, so since all equilateral triangles have 3 congruent sides, they call under the criteria of being an isosceles triangle. However, not all isosceles triangles are equilateral because some isosceles triangles will only have 2 congruent sides.   

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