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The sum of the angles of a polygon is:
(n-2)·180º
Pythagoream Theorem
a2+b2=c2
Sum of the interior angles of a triangle:
180º
Sum of the interior angles of a pentagon:
540º
Sum of the interior angles of a heptagon:
900º
Sum of the interior angles of a quadrilateral
360º
A convex polygon has all angles...
Less than 180º
A concave polygon has at least one angle ...
Greater than 180º
Area of a triangle:
(B·h):2
Area of a rectangle:
b·h
Area of a square:
L·L
Area of a paralelogram
b·h
Area of a rhombus:
(D·d):2
Area of a trapezoid:
[(B+b)·h]:2
Area of a kite:
(d1·d2):2
Area of a regular polygon
(p·a):2
