geometry crossward

2. In geometry, a plane is a flat, two-dimensional surface that extends infinitely in all directions.
9. The perimeter is the total length of the boundary of a two-dimensional figure.
11. A hexagon is a polygon with six sides.
13. Angle An acute angle is an angle that measures less than 90 degrees.
15. A segment is a part of a line consisting of two endpoints and all the points between them.
17. In mathematics, the inverse of a statement is formed by negating both the hypothesis and the conclusion.
18. Formula In coordinate geometry, the distance formula calculates the distance between two points in a plane.
20. Angles Consecutive angles are two angles that share a common side and a common vertex.
21. Rays Opposite rays are two rays with a common endpoint that extend indefinitely in opposite directions forming a straight line.

1. A theorem is a statement that has been proven on the basis of previously established statements, known facts, or generally accepted statements.
3. In geometry, an altitude is a perpendicular line segment drawn from a vertex of a triangle to the line containing the opposite side.
4. Pair A linear pair is a pair of adjacent angles formed when two lines intersect.
5. Area is a measure of the amount of space inside a two-dimensional figure.
6. Angle A right angle is an angle that measures exactly 90 degrees.
7. Lines are straight one-dimensional figures with negligible width and infinite length.
8. Bisector An angle bisector is a line or ray that divides an angle into two congruent angles.
10. (Repeated) A theorem is a statement that has been proven on the basis of previously established statements, known facts, or generally accepted statements.
12. In geometry, a kite is a quadrilateral with two pairs of adjacent sides that are equal in length.
14. In mathematics, the converse of a statement is obtained by reversing its hypothesis and conclusion.
16. The midpoint of a line segment is the point that divides the segment into two equal parts.
19. In a triangle, the centroid is the point of concurrency of the medians, which are lines drawn from each vertex to the midpoint of the opposite side.