Quadrilaterals

2. Angles that are across from each other in a quadrilateral.
3. In a rhombus, the diagonals intersect at right angles and are bisectors of each other.
5. A line that divides a figure into two mirror-image halves.
8. The point on a line segment that divides it into two equal parts.
9. Property where two or more sides of a shape have the same length.
12. The measure of a diagonal between two opposite vertices in a quadrilateral.
13. A part of a line bounded by two distinct end points.
16. A line or segment that divides an angle into two equal parts.
17. Vertices that are across from each other in a quadrilateral.
21. Property in certain quadrilaterals where both diagonals have the same length.
22. Two angles in a quadrilateral that share a common side.
25. Theorems that describe the properties of a parallelogram.
26. Sides that do not share a vertex and are across from each other in a quadrilateral.
27. A triangle with one right angle, often used in constructing certain quadrilaterals.
28. A line that divides another line into two equal parts at a right angle.
29. Two triangles that are identical in shape and size, often used in proofs.
30. Two sides that meet at a common vertex in a quadrilateral.

1. The point where two diagonals of a quadrilateral cross each other.
4. Characteristics that define a rectangle, including equal opposite sides and right angles.
6. Two angles that add up to 180 degrees.
7. An angle of exactly 90 degrees.
10. A property where diagonals of a shape intersect each other and divide each into two equal parts.
11. The basic attributes and rules governing quadrilateral shapes.
14. Angles formed between the sides within a closed figure.
15. A quadrilateral with one pair of parallel sides.
18. Attributes that make a square unique, including equal sides and angles.
19. An angle formed between any side of a polygon and an extension of its adjacent side.
20. The total measure of all interior angles in a quadrilateral, equal to 360 degrees.
23. In an isosceles trapezium, the angles adjacent to each base.
24. Sides that are equidistant along their entire length and never meet.