The perimeter = the sum of all sides, i.e.: P=AB+BC+CA Surface = (height x base)/2, i.e.: 
P=AB + BC + CD + DA. Since opposite sides of the parallelogram are congruent (equal), the perimeter can be calculated as P=2(AB + BC). Parallelogram's Surface = base x height, i.e. S_{parallelogram}=b x h, and on our case, 
The rectangle has length( L=AB) and width(l=BC). P=AB+BC+CD+DA or P=2(L+l) Rectangle's Surface = length x width 
The square is a rectangle that has all sides equal (congruent), equal to the width or length. P=AB+BC+CD+DA or P=4 L, where L is sides of the square (AB=BC=CD=DA=L). S_{ABCD}=AB^{2}. 
The perimeter = the sum of all sides, i.e.: P=AB + BC + CD + DA. Trapezium Area = (Big Base + Small Base) x Height / 2, i.e A_{trapezium}=(B + b) x h/2, and for our figure we have 
We have OA  the Radius (not. r) The Circle's Length (the circumference of the circle): 
We discuss about regular solids, and so is regular pyramid. A_{lat }= (P_{b} x a_{p}) / 2.
The Volume 
The Volume or V_{cuboid }= L x l x h. Cuboid is a particular case of light and the cube is a cuboid particular case, in that it is a cuboid with all sides congruent. Therefore we do not remember anything about them here. 
A_{b}=P_{b} x a_{b}. The Volume 
We have: AA'  generator edge (not. g) OO'  the height of the cilinder (not. h; at our particular case, at right circular cylinder, we have g=h) AO  base radius (not. r) Base Area = the area of the base circle, i.e.: Lateral Area: Total Area: The Volume of the Cilinder: 
The Cone
We have: VA  the generator (not. g) VO  Cone's Height (not. h) AO  Base's radius (not. r) Base Area = The surface of base circle, i.e.: Lateral Area: Total Area: The Volume: 
We have: A'A  generator (not. G) OO'  frustoconic's Height (not. I) AO  Big Base Radius (not. R) A'O'  Small Base Radius(not. r) Lateral Area: Total Area: The Volume:

We have: OA  Radius (not. r) Area of the Sphere: The Volume: 
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