Chapter 12, Lesson 1

12-1.A categorize polygons by the number of sides
Replace each __?__ by the name of a polygon.
A __?__ has seven sides.
b. A __?__ has ten sides.

12-1.B identify polygons from attributes
Name the polygon with the indicated properties.
a triangle with two congruent sides and an included angle that measures 90°
b. an equilateral quadrilateral that is not a regular polygon
c. a quadrilateral with exactly one pair of parallel sides