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

Answer:
a. hexagon, convex
b. pentagon, concave
c. heptagon, convex
d. decagon, concave
Step-by-step 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.