Across
- 5. The sum of two angles whose measure is 90. The angles form a right angle.
- 8. Lines meet at a 90-degree angle. Any horizontal line and a vertical line.
- 9. Sum of the areas of all the faces. This does include the bases of the shape.
- 12. Angle whose measure is less than 90. The smallest kind of angle.
- 13. Length of a line segment from its center to its perimeter. Half of the diameter.
- 16. Points are two rays that form an angle. Formed by 2 intersecting lines, it refers to a corner of the shape.
- 17. The sum of two angles whose measure is 180. The straight line at the bottom makes it this.
- 20. Any straight line segment that passes through the center of a circle and whose endpoints lie on the circle. This gets you the radius if you divide by 2.
- 22. Two nonadjacent angles are formed by two intersecting lines. The two angles are opposite rays, they are congruent.
- 24. If 3 sides of a triangle are congruent to 3 sides of a second triangle then the triangles are congruent. No angles are needed for this congruence postulate.
- 25. Coplanar lines that do not intersect. Any two vertical lines or horizontal lines.
Down
- 1. The distance around a 2-dimensional shape. The formula to find a rectangle is length+length+width+width.
- 2. The set of all points collinear to two points. It has one dimension.
- 3. Two coplanar angles with a common side or vertex but no common interior points. The two angles are side by side.
- 4. An angle whose measure is greater than 90 and less than 180. There is one type of this angle in an isosceles triangle.
- 5. Distance around a circle. It is the circle's perimeter.
- 6. The middle point of the line segment. Divides the segment into 2 congruent segments.
- 7. If 2 sides and the included angle of a triangle are congruent to 2 sides and the included angle of a second triangle then the triangles are congruent. The angle has to be in between the 2 sides in order for this congruence postulate to be true.
- 10. Amount of space that a 3D figure occupies. It uses cubic units.
- 11. If 2 angles and the non-included side of one triangle are congruent to two angles and the non-included side of a second triangle then the triangles are congruent. The 2 angles are next to each other, and the side is not between them, different from ASA.
- 14. The amount of space inside the perimeter of the flat object. To find this in a square, you do base times height.
- 15. A flat surface that forms the surface of a solid object. A cube has 6, a cylinder has 3, and a sphere has 1.
- 18. Sum of the areas of the lateral faces. This does not include the bases.
- 19. A solid geometric figure whose two end faces are equal and parallel. The sides are parallelograms.
- 21. If 2 angles and the included side of one triangle are congruent to two angles and the included side of a second triangle then the triangles are congruent. The side has to be in between the 2 congruent angles in order for the congruence postulate to be true.
- 23. Angles of equal measure. An example of vertical angles.