Two- and Three-Dimensional Shapes

Across
2.	A triangle with one obtuse angle
4.	A quadrilateral whose opposite sides are parallel and of equal length
8.	A non-polyhedron with no bases and 1 curved surface
10.	polygon with six sides and six angles
12.	A polygon with four sides and four angles
13.	A non-polyhedron that has 1 circular base and 1 curved surface
17.	A non-polyhedron that has 2 same-size circular bases and 1 curved surface
19.	A polygon with three sides and three angles
20.	A quadrilateral with two pairs of parallel sides, four sides of equal length, and four right angles

Down
1.	A triangle with no equal sides
3.	A quadrilateral with exactly one pair of parallel sides
5.	A quadrilateral with two pairs of parallel sides and four sides of equal length
6.	A triangle with 2 equal sides
7.	A triangle with one right angle
9.	A quadrilateral with two pairs of parallel sides, two pairs of sides of equal length, and four right angles
11.	A triangle with 3 equal, or congruent sides
14.	A polygon with five sides and five angles
15.	A polyhedron that has two same size and same shape polygons as bases
16.	A polyhedron with only one base
18.	A triangle with three acute angles