Technical Guide
Degrees vs Percent Slope: Civil Guide
Master the conversion between degrees and percent slope (grade). Understand rise:run ratios, why 100% slope is 45°, and ADA ramp benchmarks.
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KNOWLEDGE BASE
Angle & Trigonometry Reference Guides
Comprehensive, mathematically verified tutorials and engineering references for students, carpenters, machinists, and fabricators. Every guide provides formulas, worked examples, and direct links to our interactive digital tools.
Technical Guide
How to Find Roof Pitch: Chart & Guide
Learn how to find roof pitch safely. Step-by-step methods using a level and tape measure, attic rafters, or photos, plus formulas and rafter charts.
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Technical Guide
How to Measure an Angle in a Photo
Learn how to measure angles from photos accurately. Master camera positioning to prevent perspective distortion, lens curvature, and parallax errors.
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Technical Guide
How to Measure an Angle With a Protractor
Master measuring angles with a protractor. Step-by-step guide for physical and online tools, avoiding dual-scale errors, and measuring reflex angles.
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Technical Guide
Miter Cut Angle Chart: Saw Settings for 3–12 Sided Frames
Printable miter cut angle reference chart for woodworkers. Covers saw-setting vs complementary angle, worked examples for picture frames, hexagon planters, and octagon frames, plus common mistakes and when to use the interactive calculator.
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Technical Guide
Types of Angles: Geometry Guide
Learn all types of angles in geometry: acute, right, obtuse, straight, reflex, complementary, and supplementary angles with formulas and worked examples.
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