How-To Guides
Step-by-step guides that teach you how to perform calculations manually.
Hemisphere Calculator: Step-by-Step Guide
Calculate hemisphere volume and surface area manually
Read guideHow to Calculate Rectangular Prism Volume and Surface Area: Step-by-Step Guide
Calculate volume and surface area manually
Read guideHow to Calculate Cube Volume and Surface Area: Step-by-Step Guide
Calculate cube volume and surface area manually
Read guideCone Calculator: Step-by-Step Guide to Volume and Surface Area
Calculate cone volume and surface area manually
Read guideCylinder Calculator: Step-by-Step Guide
Calculate cylinder volume and surface area manually
Read guideHow to Calculate the Volume and Surface Area of a Sphere: Step-by-Step Guide
Calculate sphere volume and surface area manually
Read guideHow to Calculate Volume and Surface Area of 3D Shapes: Step-by-Step Guide
Calculate 3D shape volumes and surface areas manually
Read guideOblique Triangle Solver: Step-by-Step Guide
Solve oblique triangles manually
Read guideRhombus Diagonal Calculator: A Step-by-Step Guide
Calculate rhombus diagonals, area, and perimeter manually
Read guideTetrahedron Volume Calculator: Step-by-Step Guide
Calculate tetrahedron volume and surface area manually
Read guideCone Lateral Surface Area Calculator: A Step-by-Step Guide
Calculate cone lateral surface area manually
Read guideHow to Calculate Spherical Cap Volume: Step-by-Step Guide
Calculate spherical cap volume and surface area manually
Read guideHow to Calculate the Area of an Annulus: Step-by-Step Guide
Calculate annulus area manually
Read guideRegular Polygon Area Calculator: Step-by-Step Guide
Calculate regular polygon area manually
Read guideTrapezoid Perimeter Calculator: Step-by-Step Guide
Calculate trapezoid perimeter manually
Read guideEllipse Perimeter Calculator: Step-by-Step Guide
Calculate ellipse perimeter manually
Read guideHow to Calculate Ellipse Properties: Step-by-Step Guide
Calculate ellipse area, circumference, and eccentricity manually
Read guideHow to Use the Law of Cosines: Step-by-Step Guide
Solve any triangle with the law of cosines
Read guideHow to Apply the Law of Sines: Step-by-Step Guide
Solve any triangle with the law of sines
Read guideHow to Calculate Distance between Two Points in 2D Space: Step-by-Step Guide
Calculate 2D distance manually
Read guideHow to Calculate the Midpoint: Step-by-Step Guide
Learn to find the midpoint between two points manually
Read guideHow to Calculate Slope: Step-by-Step Guide
Calculate slope between two points manually
Read guideCircle Calculator: Step-by-Step Guide
Calculate circle properties manually
Read guideMastering Plane Geometry: A Step-by-Step Guide
Calculate area, perimeter, and properties of 2D shapes
Read guideHow to Calculate the Area of an Annulus: Step-by-Step Guide
Learn to manually calculate the area of an annulus (ring shape) with our step-by-step guide. Understand the formula A = π(R² − r²), see examples, and avoid common mistakes.
Read guideHow to Calculate Regular Polygon Properties: Step-by-Step Guide
Learn to manually calculate area, perimeter, and angles of regular polygons. Understand the formulas with a simple guide and worked examples.
Read guideHow to Calculate the Area and Perimeter of a Rhombus: Step-by-Step Guide
Learn to manually calculate the area and perimeter of any rhombus using simple formulas. Understand the steps, formulas, and worked examples.
Read guideHow to Calculate Parallelogram Area and Perimeter: Step-by-Step Guide
Learn to manually calculate the area (base × height) and perimeter (2 × (base + side)) of any parallelogram with this easy guide. Includes example and pitfalls.
Read guideHow to Calculate the Pythagorean Theorem: Step-by-Step Guide
Learn to manually calculate the Pythagorean Theorem to find any side of a right triangle. Includes formula, examples, and common pitfalls.
Read guideHow to Calculate Right Triangle Sides Using the Pythagorean Theorem: Step-by-Step Guide
Learn to calculate right triangle sides manually using the Pythagorean Theorem (a² + b² = c²). Includes formula, examples, and common pitfalls.
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