There are a acute,equilateral,isosceles,obtuse,isosceles and a right.So i hope you will have fun in 6th grade so you would have to know this is so fun.
It shows so of the shapes.
- of a bad, difficult, or unwelcome situation or phenomenon) present or experienced to a severe or intense degree.
1. annoyingly insensitive or slow to understand.
a four-sided figure.. having four straight sides
- a four-sided plane rectilinear figure with opposite sides parallel.
A right angle is an angle that is exactly 90 degrees. When an angle is 90 degrees, one leg of the angle is perfectly horizontal, and the other is perfectly vertical. It is the best angle for creating stable structures. You can find more information here: http://www.mathsisfun.com/rightangle.html
A straight angle changes the direction to point the opposite way. It looks like a straight line.
It measures 180° (half a revolution, or two right angles)
http://www.mathsisfun.com/definitions/rectangle.html A 4-sided flat shape with straight sides where all interior angles are right angles (90°).
Also opposite sides are parallel and of equal length.
Example: A square is a special type of rectangle.
http://www.mathsisfun.com/quadrilaterals.html Quadrilateral just means "four sides"
(quad means four, lateral means side).
Any four-sided shape is a Quadrilateral.
But the sides have to be straight, and it has to be 2-dimensional.
http://www.ask.com/question/what-is-a-trapezium In geometry a trapezium is defined as a quadrilateral that has only one pair of parallel lines. This shape has four vertices and the two adjacent angles are equal. Also the line that joins the midpoints of the parallel lines bisects the area of the trapezium.