Toinks

Triangle Facts

* Triangles are polygons with the least possible number of sides (three).

* The three internal angles of a triangle always add to 180 degrees.

* An equilateral triangle has three sides of equal length and three equal angles.

* An isosceles triangle has two sides of equal length and two equal angles.

* A scalene triangle has no sides of equal length and no equal angles.

* A right angle triangle has one angle that is 90 degrees.

* An obtuse triangle has one angle larger than 90 degrees.

* An acute triangle has angles that are all less than 90 degrees.

* The longest side of a right angle triangle is called the hypotenuse, it is always found opposite the right angle.

* Trigonometry is the study of the relationship between the angles of triangles and their sides.

* Triangle shapes are often used in construction because of their great strength.

Square

* A square is a polygon with 4 sides of equal length and 4 right angle corners (90 degree corners).

* Because it has 4 sides of equal length, a square is a regular quadrilateral.

* A square is also a rectangle with equal sides and a rhombus with right angles.

* The area of a square is equal to the length of one side to the power of two (length squared).

* The perimeter of a square is 4 times the length of one side.

* A square has a larger area than all other quadrilaterals with the same perimeter.

* The diagonals of a square bisect each other at 90 degrees and are perpendicular.

* Opposite sides of a square are parallel.

* The internal angles of a square add to 360 degrees.

* A square has 4 lines of reflectional symmetry.

* Square shapes are often used by humans for design and engineering purposes such as town planning.

* A cube features six square faces and in many ways is like a square, only in three dimensions rather than two.

Circle

* A circle is a round, two dimensional shape that looks similar to the...