Geometry Terms

5. The measure of the surface enclosed by a two-dimensional figure.
7. A line or plane that divides a segment or angle into two equal parts.
10. Having the same shape and size.
11. A line that intersects a circle at only one point
13. A two-dimensional coordinate system that uses x and y axes to locate points. Circle A closed figure in which all points are equidistant from a center point.
15. A triangle with three equal sides.
18. The portion of a solid between two parallel planes that intersect the solid.
20. The average of two numbers obtained by multiplying them together and taking the square root.
21. A line segment that connects two non-adjacent vertices of a polygon.
22. A line segment drawn from a vertex of a triangle to the midpoint of the opposite side.
23. A four-sided polygon.
26. A triangle with no equal sides.
27. The ratio of the circumference of a circle to its diameter, approximately 3.14.
28. An angle that measures more than 90 degrees but less than 180 degrees.
29. A point where two or more line segments or rays meet to form an angle.

1. A line segment drawn from a vertex of a triangle perpendicular to the opposite side.
2. The angle formed by extending one side of a triangle and intersecting with another side.
3. The portion of a circle enclosed by two radii and an arc.
4. The sum of the lengths of the sides of a two-dimensional figure.
6. An angle that measures less than 90 degrees.
8. Two lines that never intersect.
9. The point where the angle bisectors of a triangle intersect.
12. The longest side of a right triangle.
14. A two-dimensional figure that can be folded to form a three-dimensional figure.
16. A three-dimensional figure with two circular bases and a curved surface connecting them.
17. A straight path that extends infinitely in both directions.
19. An angle that measures exactly 90 degrees.
24. A line segment connecting the center of a circle to a point on the circle.
25. A triangle with two equal sides.