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8th CK Geometry
8th CK Geometric Constructions Using a Compass and Straightedge COMPLETE
Term | Definition |
---|---|
Acute angle | an angle measuring less than 90 degrees |
Acute triangle | a triangle with three acute angle |
Circumscribed circle | A circle is circumscribed about a triangle (or other polygon) when each vertex of the triangle (or other polygon) lies on the circle. |
Compass | tool used to make circles |
Congruent | figures that are exactly the same shape and size |
Equilateral triangle | a triangle with three congruent sides |
Inscribed triangle (or other polygon) | A triangle (or other polygon) is inscribed in a circle if all of its vertices lie on the circle. |
Isosceles triangle | a triangle with two congruent sides |
Obtuse angle | an angle measuring greater than 90 degrees |
Obtuse triangle | a triangle with one obtuse angle |
Parallel | lines in a plane that never intersect |
Parallelogram | a four-sided figure with opposite sides parallel and congruent |
Perpendicular | lines that intersect to form right angles |
Perpendicular bisector | a line perpendicular to the segment that divides the original segment into two congruent segments |
Protractor | an instrument used to measure angles |
Regular hexagon - | A six-sided polygon with all sides and all angles congruent |
Regular polygon | A polygon with all sides congruent and all angles congruent |
Right angle | an angle measuring 90 degrees |
Right triangle | a triangle with one right angle |
Scalene triangle | a triangle with no congruent sides |
Square | a rectangle with four congruent sides |
Straightedge | ruler (with or without numbers or units) |
Transversal | A line that intersects two or more coplanar lines in different points |