| A | B |
|---|
| right angle | a 90 degree angle |
| equilateral triangle | a triangle with all sides equal |
| scalene triangle | a triangle having three unequal sides and angles |
| vertex | the intersection point of two sides |
| right triangle | a triangle with one internal angle equal to 90 degrees |
| pentagon | a polygon with 5 sides and 5 angles |
| square | a rectangle having all four sides of equal length |
| intersecting lines | lines that cross each other |
| perpendicular lines | two lines that cross each other to form a 90 degree angle |
| acute angle | an angle less than 90 degrees |
| chord | the line segment between two points on a given curve |
| radius | a straight line extending from the center of a circle to the surface |
| line segment | one part of a line |
| Line | a continuous extent of length |
| point | a position in space |
| rectangle | a quadrilateral with opposite sides parallel |
| circle | a closed plane |
| closed curve | a curve that is continuous with meeting end points |
| hexagon | a six sided figure |
| obtuse angle | an angle greater than 90 degrees |
