##### Across

**1.**triangle – triangle with at least two sides congruent.**8.**– the distance around a circle..**13.**lines – two lines that intersect to form right angles.**14.**angles – the non-adjacent angles formed by two intersecting lines.**16.**triangle – triangle with no sides congruent.**19.**triangle – triangle with all sides congruent.**20.**angles – two angles whose sum is 90 degrees.**21.**– of a polygon is the distance around the polygon.

##### Down

**2.**angles – two angles whose sum is 180 degrees.**3.**– all sides congruent and all four right angles. . Trapezoid – quadrilateral with exactly one pair of op47. Pythagorean Theorem – in a right triangle, the sum of the squares of the legs is equal to the square of the**4.**lines – two lines are parallel if they are coplanar and do not intersect.**5.**– of any surface is the number of square units required to cover the surface.**6.**– of a 3-dimensional figure is the number of cubic units contained in the solid**7.**triangle – triangle with all angles congruent.**8.**statement – a statement that can be wri**9.**– parallelogram with consecutive sides congruent.**10.**angle – angle whose measure is between 0 degrees and 90 degrees.24.**11.**– segment whose endpoints are the center of the circle and a point on the circle.78.**12.**of a segment – a point that divides the segment into two congruent segments.**15.**angles – two coplanar angles with a common vertex and a common side between them**17.**part of a line that consists of two points called endpoints and all points between them.**18.**– the set of points in a plane that are equidistant from a fixed point called the center.