1.
triangle all sides have the same length
2.
triangle describe a triangle or a trapezoid with two
4.
triangle A triangle with one angle greater than 90
5.
triangle A triangle that has three unequal sides.
6.
Lines If they have opposite reciprocal slope
7.
Lines two lines in a plane that never intersect
9.
Labeled with a dot and a capital letter.
10.
A line segment that divides into two equal parts
11.
A line segment connecting the midpoints of
12.
leg,and it's parallel to the bases
