There are many different kinds of shapes. For our next unit, you will be required to know the followings shapes.
Quadrilateral: A four-sided polygon. The sum of the angles of a quadrilateral is 360 degrees.
Rectangle: A four-sided polygon having all right angles. The sum of the angles of a rectangle is 360 degrees.
Square: A four-sided polygon having equal-length sides meeting at right angles. The sum of the angles of a square is 360 degrees.
Parallelogram: A four-sided polygon with two pairs of parallel sides. The sum of the angles of a parallelogram is 360 degrees. Rhombus: A four-sided polygon having all four sides of equal length. The sum of the angles of a rhombus is 360 degrees.
Trapezoid: A four-sided polygon having exactly one pair of parallel sides. The two sides that are parallel are called the bases of the trapezoid. The sum of the angles of a trapezoid is 360 degrees.
Pentagon: A five-sided polygon. The sum of the angles of a pentagon is 540 degrees.
Hexagon: A six-sided polygon. The sum of the angles of a hexagon is 720 degrees.
Heptagon: A seven-sided polygon. The sum of the angles of a heptagon is 900 degrees.
Octagon: An eight-sided polygon. The sum of the angles of an octagon is 1080 degrees
Nonagon: A nine-sided polygon. The sum of the angles of a nonagon is 1260 degrees.
Decagon: A ten-sided polygon. The sum of the angles of a decagon is 1440 degrees.
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