Triangles

1. A unit for measuring angles.
3. A generally agreed-upon practice or method.
4. Arranged into categories based on characteristics.
7. A flat shape with at least three straight sides and angles.
10. A branch of math that studies the relationships between the angles and sides of triangles.
12. The length between two points.
13. A triangle with two sides of equal length.
15. A polygon with three sides and three angles.
17. Next to or touching something else; in a triangle, it refers to the side next to a given angle.
18. The bottom side of a geometric figure from which the height is measured.
19. The amount of space inside the boundary of a flat shape like a triangle or rectangle.
21. Figure Any set of points on a plane or in space (e.g., triangle, circle, square).
22. A triangle with one angle that is exactly 90 degrees.
23. Assigning names or categories to something.
24. The lines that form the boundary of a geometric shape.
26. The distance from the base to the top of a geometric figure.
28. A tool used to measure angles.

2. A triangle with all sides of different lengths.
5. The longest side of a right-angled triangle, opposite the right angle.
6. A triangle with one angle greater than 90 degrees.
8. In a right triangle, the side opposite a given angle.
9. A triangle where all angles are less than 90 degrees.
11. The total distance around the outside of a polygon.
14. To find out the size, amount, or degree of something.
16. Points where the sides of a polygon meet.
20. The space between two intersecting lines or surfaces, usually measured in degrees.
25. A triangle with all three sides of equal length.
27. Standard quantities used to measure things.