By Pythagoras theorem,
(Hypotenuse)2
= (side one)2+ (side two)2
Area of
rectangle= length*breadth
Side of
square= (side)2
Area of
a parallelogram= base*height
Area of
a triangle= 
base*height
base*height
Area
of an equilateral triangle= 
(side)2
(side)2
Area
of a rhombus = ½*products of lengths of diagonals
Area
of a trapezium =*sum of lengths of parallel sides*height
*sum of lengths of parallel sides*height
Area
of triangle= 
Diameter
=
Radius
= 
Area
of the circle = πr2
(a+b)2
= a2+2ab + b2
(A-b)
= a2-2ab + b2
(A+b)
(A-b) = a2 – b2
(x+5)
= x2 +10x+25
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