![]() ![]() ![]() On the contrary, one cannot assume perpendicularity. It seems like there’s no bend in the line, then there’s no bend: i.e. Notice that the “straightness” is one of the very few things we can assume on the GRE. Line ADC is “straight” but not “horizontal.” Also, a “horizontal” line is parallel to the top or bottom of the page, parallel to the distant horizon. Any line that does not bend is “straight,” irrespective of the direction. Make sure that you don’t confuse “straight” lines with “horizontal” lines. ![]() Take a look at this diagram ADC is a straight line. A straight line is made up of 180 degrees. Where, r = Radius of the Sphere Types of Geometry Formulas and Rules Angles and LinesĪ right angle consists of 90 degrees. V o l u m e o f a S p h e r e = V = 4 3 π r 3 V o l u m e o f a S p h e r e =V=43πr3 S u r f a c e A r e a o f a S p h e r e = S = 4 π r 2 S u r f a c e A r e a o f a S p h e r e =S=4πr2 Where, r = Radius of the base of the Cone, h = Height of the Cone V o l u m e o f a C o n e = V = π r 2 h V o l u m e o f a C o n e =V=πr2h S u r f a c e A r e a o f a C o n e = S = π r ( r + h 2 + r 2−−−−−−√ ) S u r f a c e A r e a o f a C o n e =S=πr(r+h2+r2) Where, r = Radius of the base of the Cylinder h = Height of the Cylinder V o l u m e o f a C y l i n d e r = V = π r 2 h V o l u m e o f a C y l i n d e r =V=πr2h S u r f a c e A r e a o f a C y l i n d e r = S = 2 π r h S u r f a c e A r e a o f a C y l i n d e r =S=2πrh S u r f a c e A r e a o f a C u b e = S = 6 a 2 S u r f a c e A r e a o f a C u b e =S=6a2 Where, b 1 b1 & b 2 b2 are the bases of the Trapezoid h = height of the TrapezoidĪ r e a o f a C i r c l e = A = π × r 2 Area of a Circle=A=π×r2Ĭ i r c u m f e r e n c e o f a C i r c l e = A = 2 π r Circumference of a Circle=A=2πr Where b = base of the triangle h = height of the triangleĪ r e a o f a T r a p e z o i d = A = ( b 1 + b 2 ) h 2 Area of a Trapezoid = A = (b1+b2) h2 P e r i m e t e r o f a R e c t a n g l e = P = 2 ( l + b ) Perimeter of aRectangle = P = 2(l+b)Ī r e a o f a S q u a r e = A = a 2 Area of a Square = A = a2Ī r e a o f a R e c t a n g l e = A = l × b Area of a Rectangle = A = l×bĪ r e a o f a T r i a n g l e = A = b × h 2 Area of a Triangle = A = b×h2 Where a = Length of the sides of a Square P e r i m e t e r o f a S q u a r e = P = 4 a Perimeter o fa Square = P = 4a However, the basic geometry formulas are widely used in our daily life to calculate the length, space and so on. Many of the geometric formulas are quite complicated and there are some you must have hardly ever seen. There are loads of geometric formulas that are concerned with height, length, width, radius, perimeter, area, volume or surface area. Geometry Formulas are crucial elements to calculate the perimeter, length, area, and volume of geometric shapes and figures. The main thing every student needs to know about this subject are the Geometry Formulas. It is also used for calculating the arc length and radius, etc. Solid Geometry deals with calculating the perimeter, length, area, and volume of different geometric figures and shapes. Plane Geometry is for shapes such as triangles, circles, rectangles, square, geometry formulas and much more. Geometry is divided into two types: Plane Geometry and Solid Geometry. ![]() It was also predominant many cultures of earlier times and has always been a practical way of calculating lengths, areas, and volumes using geometry formulas. Geometry is a subdivision of the subject mathematics that is all about shape, size, the properties of space and relative position of figures. ![]()
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