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16 terms

Polygon Vocabulary

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acute triangle
a triangle with three acute angles
equilateral triangle
a triangle with all equal sides and angles quadrilateral a polygon with four sides
hexagon
a polygon with six sides
isosceles triangle
a triangle with two sides that are congruent
obtuse triangle
a triangle with one obtuse angle
octagon
a polygon with eight sides right triangle a triangle with one right angle
parallelogram
a polygon with two pairs of parallel sides
pentagon
a polygon with five sides
polygon
a closed plane figure with sides made from straight line segments
quadrilateral
a polygon with four sides
rectangle
a parallelogram with all right angles
rhombus
a parallelogram with all sides the same length
right trapezoid
a trapezoid with one right angle
right triangle
a triangle with one right angle
scalene triangle
a triangle with no sides having the same
square
a parallelogram with all sides the same length and all right angles