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# 8th CK Geometry

### 8th CK Geometric Constructions Using a Compass and Straightedge COMPLETE

TermDefinition
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
Created by: artisteacher