Across
- 1. Two figures are congruent if all corresponding lengths are the same, and if all corresponding angles have the same measure. Colloquially, we say they "are the same size and shape," though they may have different orientation. (One might be rotated or flipped compared to the other.)
- 2. line segment where two faces intersect.
- 3. closed curved figure
- 7. polygon with an angle measuring more than 180°. Concave polygons look like they are collapsed or have one or more angles dented in.
- 8. A line segment that joins two points on a curve.
- 9. A line segment that never touches one another. However, these lines always run the same distance apart from one another.
- 12. This is where two line segments intersect or meet forming an angle.
- 13. infinite strip containing a symmetric pattern.
- 14. Points are geometric objects that have only location. To describe their location, we use coordinates. We begin with a standard reference frame (typically the x- and y-axes). The coordinates of a point describe where it is located with respect to this reference frame. They are given in the form (x,y) where the x represents how far the point is from 0 along the x-axis, and the y represents how far it is from 0 along the y-axis. The form (x,y) is a standard convention that allows everyone to mean the same thing when they reference any point.
- 16. This is an angle that measures less than 90 degrees.
- 19. An angle that measures 90 degrees.
- 20. A face is a polygon by which a solid object is bound. For example, a cube has six faces. Each face is a square.
Down
- 1. This refers to the distance around a circle or what is known as circle’s perimeter.
- 4. An angle bisector is a ray that cuts the angle exactly in half, making two equal angles.
- 5. This triangle has two even proportioned sides, which also have two equal internal angles.
- 6. A triangle with this name is none other than a triangle that has three sides and all three of them have different lengths.
- 10. This refers to a line segment that is coming from the center of a circle ending at any point on the circle’s circumference.
- 11. intersection of a graph with one of the axes. An intersection with the horizontal axis is often referred to as an x-intercept, and an intersection with the vertical axis is often referred to as a y-intercept.
- 15. This type of angle measures more than 90 degrees.
- 17. This refers to a part of a curve.
- 18. This refers to a line segment or the length that joins two points on a circle’s circumference that passes through the circle’s center. The diameter is twice the length of the radius.