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Geometry

TermDefinition
Acute Angle Less than 90°
Right Angle Exactly 90°
Obtuse Angle Between 90° and 180°
Straight Angle Exactly 180°
Polygon A closed shape with straight sides.
Triangle 3 sides
Quadrilateral 4 sides
Pentagon 5 sides
Square 4 equal sides, 4 right angles
Rectangle Opposite sides equal, 4 right angles
Parallelogram Opposite sides parallel
Trapezoid One pair of parallel sides
Perimeter The distance around a shape
Area The amount of space inside a shape
formula for area of a Rectangle or square A = l × w
formula for area of a triangle A = ½ × base × height
Volume Amount of space inside a 3D object
Formula for Volume of a Rectangular Prism V = l × w × h
Surface Area Total area of all faces of a 3D shape
X-axis Horizontal axis
Y-axis Vertical axis
Ordered Pair (x, y) shows a point’s location
Created by: bnschaefer
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