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Geometry Terms Glossary

Equilateral
A figure having all the sides equal

Quadrilateral
A plane figure having four sides and four angles

Polygon
A closed plane figure having many angles and sides (more than four)

Octagon
A polygon having eight angles and eight sides

Rhombus
An oblique-angled equilateral parellelogram

Heptagon
A polygon having seven angles and seven sides

Dodecagon
A polygon having twelve angles and twelve sides

Hexagon
A polygon having six angles and six sides

Nonagon
A polygon having nine angles and nine sides

Hypotenuse
The side of a right triangle opposite the right angle

Trapezoid
A quadrilateral plane figure having two parallel and two nonparallel sides

Scalene
A triangle with three unequal sides

Isosceles
A triangle with two equal sides

 

Algebra 3-4 | Algebra 5-6 | Algebra 6-8
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