Vocabulary: Geometry

3. A triangle whose sides are all the same length.
6. A statement composed of letters, numbers and operations that shows two mathematical expressions are equal.
8. The longest distance across the circle; it is twice the radius.
9. The distance from the center to the circumference of a circle; it is half of the circle's diameter.
12. Two or more angles with the sum of 90°.
15. The ratio between two corresponding sides of similar figures. (two words)
16. An equation showing that two ratios are equivalent.
17. To find the value of a mathematical expression.
18. A 3-dimensional shape with six square faces.
23. A 3-dimensional figure that has two congruent and parallel faces that polygons along with parallelograms for the remaining faces.
24. A mathematical sentence that compares two unequal expressions using one of the following symbols: <, >, ≤, ≥, and ≠.
25. A closed figure formed from three or more line segments that meet only at their endpoints.
29. Circles, squares, triangles and rectangles which can be either 2-dimensional (flat) or 3-dimensional (solid) depending on their structure. (two words)
31. A pair of angles that share a common side and vertex, but no common interior points (side by side).
33. Having only two dimensions, such as width and height but no thickness.(two words)
34. The replacement of the variables in an algebraic expression with its known value.

1. Having three dimensions (such as height, width and depth), like any object in the real world.(two words)
2. The total area of ALL the surfaces of a 3-dimensional object. (two words)
4. A four-sided figure.
5. The measure, in square units, of the enclosed interior region of a 2-dimensional figure; (LW).
7. The distance around a circle, which equals a little more than three times the diameter..
10. The branch of mathematics that deals with points, lines, shapes and space.
11. Angle with measure less than 90°.
13. The two-dimensional shape exposed when a three-dimensional figure is sliced.
14. The number of cubic units that it takes to fill a figure; (LWH).
15. Two or more angles with the sum of 180°.
19. A solid with flat faces; each face being a polygon. Examples include prisms, pyramids, cubes, etc.
20. Triangle that has no congruent side lengths.
21. The combination of two or more geometric shapes. (two words)
22. An angle whose measure is exactly 90°.
26. Angle measuring greater than 90°.
27. Angles that are opposite in position, but congruent in measure.
28. Ratio that relates a drawing length to the actual length it represents. (two words)
30. A triangle with just two equal sides.
32. A polyhedron whose base is a polygon and other faces are triangles that share a common vertex.