| A | B |
|---|
| altitude | height of a triangle |
| arc | ... |
| base | side of a triangle perpendicular to the height |
| central angle | angle whose vertex is the center of a circle and whose sides contain chords of the circle |
| centroid | the point of intersection of the three medians of a triangle |
| chord | segment whose endpoints are points on a circle |
| circle | set of points in a plane equidistant from a given point |
| congruent figures | two geometric figures that have exactly the same size and shape |
| contrapositive | statement formed by switching the hypothesis and conclusion of a conditional statement AND negating it |
| converse | statement formed by switching the hypothesis and conclusion of a conditional statement |
| diagonal | segment that joins two nonconsecutive vertices of a polygon |
| diameter | distance across the circle through its center |
| hypotenuse | side opposite the right angle in a right triangle |
| inscribed angle | angle with vertex on a circle and in the interior of the circle |
| inverse | statement formed by negating a conditional statement |
| kite | polygon with two pair of consecutive sides congruent and opposite sides not congruent |
| leg | sides of a right triangle NOT opposite the right angle |
| median of a triangle | segment whose endpoints are the vertex of a triangle and the midpoint of the opposite side |
| midsegment of a triangle | segment whose endpoints are the midpoints of two sides of a triangle |
| proportion | equation that equates two ratios |
| radius | segment of a circle whose endpoints are the center of the circle and a point on the circle |
| ratio | comparison of two numbers |
| rectangle | quadrilateral with four congruent angles |
| regular | polygon with congruent sides and angles |
| rhombus | parallelogram with four congruent sides |
| scale factor | ratio of the lengths of two corresponding sides in similar figures |
| secant | line that intersects a circle in exactly two points |
| similar figures | two geometric figures with congruent corresponding angles and corresponding proportional sides |
| tangent | line that intersects a circle in exactly one point |
