| Term | Definition |
|---|
| equals | exactly the same as |
| congruent | same size and shape |
| congruent segments | segments with the same length |
| midpoint (of a segment) | a point that dixides a segment into two congruent segments. |
| angles | formed by two rays with the same endpoint |
| congruent angles | angles with the same measure |
| distance formula | d= (square root of (x2 -x1)2 + (y2 - y1)2 ) |
| construction | a geometric figure made by using only a straight-edge and a compass. |
| a straight-edge | a ruler with no markings on it |
| compass | a geometric tool used to draw circles and parts of circles called arcs. |
| perpendicular lines | two lines that intersect to form right angles |
| perpendicular bisector (of a segment) | a line, segment, or ray that is perpendicular to the segment at its midpoint. |
| angle bisector | a ray that divides an angle into two congruent angles. |
| perimeter | the sum of the length of the sides of a figure |
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