What is a polygon that has three sides and three angles?
triangle
What is a shape with AT LEAST three straight sides and angles?
polygon
A triangle with three congruent sides.
equilateral triangle
A triangle with NO congruent sides.
scalene
A triangle with two congruent sides.
isosceles
A triangle with one angle greater than 90 degrees.
obtuse
A triangle with 3 angles that are each less than 90 degrees.
acute
A triangle with one angle that is exactly 90 degrees.
right
The point where two lines, line segments, or rays meet is called an __________.
angle
A polygon with four sides and four angles
quadrilateral
A quadrilateral with 4 equal sides and 4 right angles
square
A quadrilateral with 2 pairs of parallel sides and 4 right angles. Opposite sides are congruent.
rectangle
A quadrilateral with 1 pair of parallel sides. It has two acute angles and two obtuse angles.
trapezoid
A quadrilateral with 4 equal sides.
rhombus
A quadrilateral with 2 pairs of parallel sides. Opposite sides are congruent.
parallelogram
This has a point and extends endlessly in one direction.
ray
