You can save and load the formulas to create a formula library. Complex tasks can be explained visually by importing drawings in bitmap format.
Box (Rectangular Prism or Cuboid) Rectangular Prism A solid (3dimensional) object which has six faces that are rectangles. It is a prism because it has the same crosssection along a length. Formulas for the rectangular prism: Volume = lwh Lateral Surface Area = 2(lh + wh) Note: lw can be top or bottom. Bottom sometimes referred to as the base. Total Surface Area = 2(lw + lh + wh) from User Manual: Several mathematical expressions can be written per row. Between each mathematical expression use a colon. RedCrab Calculator uses implied multiplication. That means you do not need to include the multiplication operator. RedCrab interprets a sequence of letters, for example, ab, as different variables. Example: abc : a * b * c 3ab : 3 * a * b 

fig. 1 Box Volume and Surface Area  fig. 2 Box Information and Reference 
Volume = lwh Lateral Surface Area = 2(lh + wh) Surface Area = 2(lw+lh+wh) 
Rectangular Prism Rectangular Prism Prism 

Pyramid from User Manual: Several math expressions can be writtenin a row. Between each math expression, there must be a colon. Note. : l = 6: w = 5: h = 4 The expression: c=√((w/2)²+h²): Enter: c = < Ctrl +1 > ((w/2) < Ctrl +2 > + h < Ctrl +2 > ) The expression: d=√((l/2)²+h²): Enter: d = < Ctrl +1 > ((l/2) < Ctrl +2 > + h < Ctrl +2 > ) l = length of base w = width of base h = height of pyramid c and d = slant height of pyramid faces (c= length face & d = width face) Reference: Pyramid Problems 
fig. 3 Pyramid Volume and Surface Area  fig. 4 Pyramid Information & Reference 
Volume = lwh/3  Reference: Online Rectangular Pyramid Calculator 
Surface Area = lc+wd+lw  Reference: Online Rectangular Pyramid Calculator 
c=√((w/2)²+h²) d=√((l/2)²+h²)  Reference: Online Rectangular Pyramid Calculator 

Topless Pyramid Information and Reference A trunctated pyramid volume is one third the height times (A + B) + sqrt(A B) or h/3(ab+cd)+√(abcd) where A and B are the area of the top and bottom faces. A= area (AB) and B= area (CD) from User Manual: RedCrab interprets a sequence of letters, for example, ab, as different variables. Excluding subscript letters, for example X_{L}. Subscript letters always belong to the variable on the left. It is not allowed to split an expression and continue in the next row. Wrong: z = 12+14+15+20 +5+10 Correct: X = 12+14+15+20 Z = X+5+10 variables: Upper case and lower case letters are different variables. Example: v and V are different variables 
fig. 5 Topless Pyramid Volume and Surface Area  fig. 6 Topless Pyramid Information & Reference 
Volume = (h/3)((ab)+(cd)+√(abcd))  Reference: Online Topless Pyramid calculator 
r = (ab+cd)+(a+c)√((1/4)(bd)²+h²)  Reference: Online Geametric shapes Calculator 
Surface Area = r+(b+d)√((1/4)(ac)²+h²)  Reference: Online Truncated Pyramid Calculator 
Cylinder Information and Reference The expression: v = πr²h: Enter: v = < Ctrl + P > r < Ctrl + 2 > h r = radius of cylinder h = height of cylinder Reference: cylinder volume cylinder surface area http://mathinary.com/cylinder2.jsp cylinder calculator 

fig. 7 Cylinder Volume & Surface Area  fig. 8 Cylinder Information & Reference 
Volume = πr²h  Note: 2πr(r+h) = 2πr² + 2πrh 
Surface Area = 2πr(r+h)  Reference: cylinder formulas 

Cone Information and Reference The expression: v = πr²h/3 Enter: v = < Ctrl + P > r < Ctrl + 2 > h/3 r = radius of cone base h = height of cone l = slant height of cone (see diagram) l = √(r²+h²) Total Surface Area = Lateral Surface Area + Base Area Lateral Surface Area = πr√(r²+h²) Base Area = πr² Total Surface Area = πr²+πr√(r²+h²) 
fig. 9 Cone Volume and Surface Area  fig. 10 Cone Information and Reference 
Volume = πr²h/3  Reference: Cone formulas 
Surface Area = πr²+πR√(R²+h²)  Reference: Cone Calculator 
Topless Cone Information and Reference L= Lateral Surface Area : A= Total Surface Area V= Volume It is not allowed to split an expression and continue in the next row. Wrong: z= 12+14+15+20 +5+10 Correct: x= 12+14+15+20 z= x+5+10 Topless Cone = Cone Frustum = Truncated Cone truncatedcone calculator slant height:s height:h small radius:r large radius:R s=sqrt((Rr)^2+h^2) v= volume a= area v=pi(R^2+rR+r^2)h/3 a=pi(r(r+s)+R(R+s))  
fig. 11 Topless Cone Volume  fig. 12 Topless Cone Information & Reference 
Volume = πh/3(R1²+R2²+R1R2)  Reference: Truncated Cone 
Surface Area = π(R1+R2)√((R1R2)²+h²)+π(R1²+R2²)  Reference: Cone Frustum 

Sphere Information and Reference Error message: For error location RedCrab marks the cell where an error is detected with a blue frame. It also marks the incorrect formula with a red frame. The expression: v = 4/3πr³: Enter: v = 4/3 < Ctrl + P > r < Ctrl + 3 > r = radius of sphere 
fig. 13 Sphere Volume and Surface Area  fig. 14 Sphere Information and Reference 
Volume = 4/3πr³  Reference: Sphere Calculator 
Surface Area = 4πR²  Reference: Sphere Calculator 

Sphere 2 Base Segment Information and Reference You can write several mathematical expressions on one worksheet. The expression result displays only if terminated with an equal sign. Examples: a = 27+9 (result a= below) a = 36 a= 27+9 = 36 a = 27+9 (no result shown) a= large radius of segment b= small radius segment h= height of segment R= radius of sphere 
fig. 15 Sphere 2 base segment Volume and Surface Area  fig. 16 Sphere 2 base segment Information and Reference 
Volume = (π/3)h²(3Rh)  Reference: Volume of a Spherical Segment 
Surface Area = 2πRh  Reference: Surface Area of a Spherical Segment 
Spherical Lune/Wedge Volume and Surface Area A Spherical Lune is the surface area of a Spherical Wedge. θ = angle in degrees r = radius of sphere The keys < Ctrl + 2> write the exponent 2. The keys < Ctrl + 3> write the exponent 3. The keys < Ctrl + Q> write the Greek letter θ Reference: Sphere formulas Reference: Spherical wedge formulas Reference: Spherical wedge formulas 

fig 17 Spherical Lune/Wedge Volume and Surface Area  fig 18 Spherical Lune/Wedge Information and Reference 
Volume Spherical Wedge= (π/270)r³θ  Reference: Volume of a Spherical Wedge in degrees 
Surface Area Spherical Lune= (π/90)r²θ  Reference: Surface Area of a Spherical Lune in degrees 
Spherical Cap Information and Reference The expression: A = 2πrh: Enter: A = 2 < Ctrl + P > r h Implied multiplication means you do not need to include the multiplication operator. Example: A = 2πrh equals A = 2*π*r*h r = radius of sphere h = height of cap a = radius of cap 

fig. 19 Spherical Cap Volume and Surface Area  fig. 20 Spherical Cap Information and Reference 
Volume = πh²(3Rh)/3  Reference: Spherical Cap Calculator 
Surface Area = 2πRh  Reference: Spherical Cap 

Spherical Sector Information and Reference Save: If you are saving a file for the first time, use SaveAs on the File menu, it will prompt you for a file name. If you are saving a changed file, click Save on the file menu Open: Click Open on the File menu. In the Navigation pane, click on the folder or drive that contains the file that you want to open. You can only load a file that is saved with RedCrab before, with the file extension *.rcc. 
fig. 21 Spherical Sector Volume and Surface Area  fig. 22 Spherical Sector Information and Reference 
Volume = (2/3)πR²h  Reference: Spherical Sector 
Surface Area = 2πRh  Reference: Spherical Sector 