Geometry Flashcards
What is a Polygon?
A closed figure made up of a minimum of 3 line segments (not curves) in 2D
What is a Quadrilateral?
A polygon with 4 sides and 4 angles.
What is a Square?
A quadrilateral with 4 congruent sides and 4 right angles and 2 sets of parallel lines. Squares are types of Rectangles and Rhombuses)
What is a Rectangle?
A quadrilateral with 2 sets of congruent parallel sides & 4 right angles.
What is a Rhombus?
A quadrilateral with 4 congruent sides, 2 sets of parallel lines and opposite equal angles. Its a special kind of parallelogram
What is a Trapezoid?
A quadrilateral with only one set of parallel sides.
What is a Parallelogram?
A quadrilateral with 2 sets of parallel lines and opposite congruent sides. Like a slanted rectangle or square
What is a Triangle?
A polygon with 3 sides and 3 angles.
What is an Equilateral Triangle?
A triangle with 3 equal sides and 3 equal angles.
What is an Isosceles Triangle?
A triangle with 2 equal sides and 2 equal angles.
What is a Scalene Triangle?
A triangle with no equal sides or angles.
What is an Acute Triangle?
A triangle with all angles less than 90°.
What is a Right Triangle?
A triangle with one 90° angle.
What is an Obtuse Triangle?
A triangle with one angle greater than 90°.
Congruent
Equal or the same
Parallel Lines
Lines in a plane that never intersect and are the same distance apart at every point
Intersecting Lines
LINES THAT CROSS AT ONE POINT
Perpendicular Lines
Lines that intersect to form 4 right angles
