Names of Polygons
Polygon Attributes
Quadrilaterals
Angles
Triangle
100
a polygon with four sides, four vertices, and four angles.
quadrilateral
100
All polygons are ________________ because there is no space between the sides.
closed
100
What is a quadrilateral with four equal sides and four right angles called?
square or rectangle
100
When 2 sides meet at a vertex, an __________________ is formed.
angle
100
What is a triangle with equal sides and angles?
equilateral triangle
200
a polygon with six sides, six vertices, and six angles
hexagon
200
All polygons have at least ___________ sides, angles, and vertices.
3
200
If a quadrilateral has only one pair of parallel sides, it is called a _____________________.
trapezoid
200
This angle looks like an L and measures 90 degrees.
right angle
200
What is a triangle with one right angle?
right triangle
300
a polygon with eight sides, eight vertices, and eight angles
an octagon
300
If two lines never cross, they are what type of lines?
parallel
300
What is a quadrilateral with four equal sides but not equal angles called? Hint: 2 angles are small and 2 are big
rhombus
300
This angle is smaller than a right angle.
acute
300
What is a triangle with one angle larger than a right angle?
obtuse triangle
400
a polygon with 3 sides, 3 vertices, and 3 angles
triangle
400
the point in which two sides meet on a polygon
vertex
400
If one side of a rectangle is 5 inches and another side is 4 inches, what is the perimeter of the rectangle?
18 inches
400
This angle is bigger than a right angle.
obtuse
400
What is a triangle with 3 angles that are all smaller than a right angle?
acute triangle
500
a polygon with 5 sides, 5 vertices, and 5 angles
pentagon
500
If two lines intersect and form a right angle, they are _________________ lines.
perpendicular
500
Squares, rectangles, and rhombuses are also called ______________________ because their opposite sides are parallel.
parallelograms
500
If an angle measures 50 degrees, it is a ______________ angle.
acute angle
500
What is a triangle with two sides that are the same length?
isosceles triangle
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