##### Across

**3.**/ A segment joining a vertex to the opposite side so that it is perpindicular to that side**6.**/ Not parallel and they don't touch**7.**/ A closed figure formed by three or more line segments called sides**8.**Of Exterior Angles / 360 Degrees**11.**Angles / 180 Degrees**12.**/ A triangle that has all equal sides**14.**Angle / 90 Degrees**15.**/ A segment joining a vertex to the midpoint of the opposite side**17.**/ Opposite and flipped fraction**19.**Addition Postulate / Part + Part = Whole

##### Down

**1.**/ The class we are in**2.**/ 3 sides**4.**Angles / 2 angles that are directly across from each other on intersecting lines and they are always congruent**5.**Triangles / Triangles that have the same shape and size**6.**/ 4 sides**9.**/ A quadrilateral in which both pairs of opposite sides are parallel**10.**/ 10 sides**11.**of Interior Angles / S = (n-2) x 180**13.**Lines / Lines that go on forever but never intersect**16.**/ A triangle with 2 congruent sides**18.**Theorem / a^2 + b^2 = c^2