Question

Classify each polygon by the number of sides. Tell whether it's convex or concave.
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Answer 1

a. hexagon, convex

b. pentagon, concave

c. heptagon, convex

d. decagon, concave

Explanation:

Count the sides. Refer to your memory or a list of polygon names for the appropriate name.

If any internal angle measures more than 180°, the polygon is concave. Otherwise, it is convex.