Geometry

5. intersecting lines that form a 90° angle
6. a part of a line or curve
7. a straight figure that does not have a thickness, and it extends endlessly in both directions.
8. The line that divides something into two equal parts.
12. the action of becoming or being made wider, larger, or more open.
14. a line joining the midpoints of two sides of a triangle.
15. where two lines cross over

1. rise/run
2. two lines that have the same slope
3. the longest side of a triangle
4. three sided shape
9. An instrument with two arms, one sharp and one with a pencil that can be used to draw circles or arcs.
10. d=√((x_2-x_1)²+(y_2-y_1)²)
11. a figure formed by two lines, measured by protractor
13. a line that passes through two very specific points on a triangle