Unit 4 Shape properties

Term: Parallelogram

Definition: A quadrilateral where opposite sides are parallel and congruent, opposite angles are congruent, consecutive angles are supplementary, and diagonals bisect each other.

Term: Rectangle

Definition: A parallelogram with four right angles and congruent diagonals.

Term: Rhombus

Definition: A parallelogram with four congruent sides, where diagonals are perpendicular and bisect opposite angles.

Term: Square

Definition: A quadrilateral that has all the properties of both a rectangle and a rhombus; its diagonals are congruent and perpendicular.

Term: Trapezoid

Definition: A quadrilateral with only one pair of parallel sides.

Term: Isosceles Trapezoid

Definition: A trapezoid where diagonals are congruent.

Term: Triangle Midsegment Theorem

Definition: A midsegment connects the midpoints of two sides, is parallel to the third side, and is half the length of the third side.

Term: Centroid

Definition: The intersection point of all three medians of a triangle, which divides each median in a 2:1 ratio.

Term: Median (of a triangle)

Definition: A line segment from a triangle's vertex to the midpoint of the opposite side.