Across
- 3. Formed by two rays sharing a vertex. Measures the amount of turn between the rays
- 4. The longest side of a right triangle. It is always opposite the right angle
- 9. A triangle that has three equal sides. A triangle that all three angles measure 60 degrees.
- 11. Two angles that measure up to 90 degrees. Two angles that form a right angle
- 12. This describes figures that have the same shape and size. Their corresponding sides and angles are equal
- 13. This describes figures with the same shape but different sizes. Their corresponding angles are equal and sides are proportional
- 14. Angles that share a common side and a common vertex. Angles that are next to each other without overlapping
- 18. This divides a segment or angle into two equal parts. Angle bisectors are often used in triangle constructions
- 19. These are lines that never intersect. They remain the same distance apart
- 20. A triangle that has at least two equal sides. A triangle that one side called the base is not equal to the other sides
Down
- 1. A triangle that has no equal sides. All three sides of the triangle are different lengths
- 2. An angle that measures greater than 90 degrees but less than 180 degrees. An angle that appears more open and spread out
- 5. A closed shape made up of straight line segments. The sides of these shapes must connect end to end without crossing
- 6. Two angles that measure up to 180 degrees. Two angles that form a straight line
- 7. Lines intersect to form a 90-degree angle. Lies that meet at a perfect corner
- 8. This is a polygon with three sides. Its interior angles sum to 180 degrees
- 10. Corner where shades of sides meet. Polygons have several of these corner points
- 15. The amount of space inside a three-dimensional object. It is measured in cubic units
- 16. One of the two shorter sides of a right triangle. It is not the longest side of the triangle
- 17. A flat surface that extends forever in all directions. A surface that has length and width but no thickness