Geometry

2. Triangle / A triangle with a right angle.
5. / The amount of space that a substance or object occupies, or that is enclosed within a container, especially when great.
7. / Combining in such a way as to enhance or emphasize the qualities of each other or another.
8. / the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.
9. / Identical in form; coinciding exactly when superimposed.
10. / The extent or measurement of a surface or piece of land.

1. / The continuous line forming the boundary of a closed geometric figure.
3. / A plane figure with three straight sides and three angles.
4. / Either of two angles whose sum is 180^c2^b0
6. Area / In general, the surface area is the sum of all the areas of all the shapes that cover the surface of the object.