Geometry & Trigonometry
Improve your geometry and trigonometry skills with written and video tutorials on the following topics.
Online Resources
- Lines (Khan Academy) - Opens in a new windowVideos tutorials on lines, line segments, and rays.
- Angles (Khan Academy) - Opens in a new windowVideo tutorials on angle basics, interpreting angles, and relationships between angles.
- Shapes (Khan Academy) - Opens in a new windowVideo tutorials on classifying shapes and finding angles in shapes
- The coordinate plane (Khan Academy) - Opens in a new windowVideo tutorials on the basics of the coordinate plane and shapes on the coordinate plane.
- Area and perimeter (Khan Academy) - Opens in a new windowVideo tutorials on the area and perimeter of polygons, area and circumference of circles, and scale drawings.
- Volume and surface area (Khan Academy) - Opens in a new windowVideo tutorials on surface area and the volume of prisms, cones, cylinders, and spheres.
- The Pythagorean theorem (Khan Academy) - Opens in a new windowVideo tutorials on the Pythagorean theorem, special right triangles, and Pythagorean theorem proofs.
- Transformations, congruence, and similarity (Khan Academy) - Opens in a new windowVideo tutorials on transformations, congruence, and similarity.
- Tools of geometry (Khan Academy) - Opens in a new windowVideo tutorials on Euclidean geometry, lines, line segments, rays, points, lines, planes, geometric definitions, and the golden ratio.
- Angles & intersecting lines (Khan Academy) - Opens in a new windowVideo tutorials on angle basics, angle measurement, angle types, vertical angles, complementary and supplementary angles, angles between intersecting and parallel lines, and angles with triangles and polygons.
- Special properties and parts of triangles (Khan Academy) - Opens in a new windowVideo tutorials on the triangle inequality theorem, perpendicular bisectors, angle bisectors, medians and centroids, and altitudes.
- Quadrilaterals (Khan Academy) - Opens in a new windowVideo tutorials on types of quadrilaterals and quadrilateral proofs and angles.
- Transformations (Khan Academy) - Opens in a new windowVideo tutorials on translations, rotations, reflections, dilations, sequences of transformations, properties and definitions of transformations, and symmetry.
- Congruence (Khan Academy) - Opens in a new windowVideo tutorials on transformations and congruence, triangle congruence, theorems concerning triangle properties, working with triangles, theorems concerning quadrilateral properties, and proofs of general theorems that use triangle congruence.
- Similarity (Khan Academy) - Opens in a new windowVideo tutorials on triangle similarity, solving similar triangles, angle bisector theorem, solving problems with similar and congruent triangles, and solving modeling problems with similar and congruent triangles.
- Right triangles and trigonometry (Khan Academy) - Opens in a new windowVideo tutorials on special right triangles, trigonometric ratios, modeling with right triangles, trigonometric ratios and similarity, sine and cosine of complementary angles, the law of sines, the law of cosines, and solving general triangles.
- Circles (Khan Academy) - Opens in a new windowVideo tutorials on circle basics, arc measure, arc length, radians, sectors, inscribed angles, inscribed shapes problem solving, properties of tangents, area of an inscribed triangle, standard equation of a circle, and expanded equation of a circle.
- Volume and surface area (Khan Academy) - Opens in a new windowVideo tutorials on basic area, advanced perimeter and area, area formula proofs, advanced area with triangles, area and circumference of circles, volume and surface area, surface and volume density, cross sections of 3D objects, the Koch snowflake fractal, and Heron's formula.
- Analytic geometry (Khan Academy) - Opens in a new windowVideo tutorials on distance and midpoints, problem solving with distance on the coordinate plane, dividing line segments, parallel and perpendicular lines on the coordinate plane, equations of parallel and perpendicular lines, coordinate plane proofs, and the equation of a circle.
- Geometry at Wolfram MathWorld - Opens in a new windowAn extensive, encyclopedia-style resource including definitions and explanations of geometry concepts and terms.
- Trigonometry with right triangles (Khan Academy) - Opens in a new windowVideo tutorials on trigonometric ratios, modeling with right triangles, sine and cosine of complementary angles, and more.
- Trigonometry with general triangles (Khan Academy) - Opens in a new windowVideo tutorials on the law of sines, the law of cosines, and solving general triangles.
- The unit circle definition of sine, cosine, and tangent (Khan Academy) - Opens in a new windowVideo tutorials on radians, the unit circle definition of sine, cosine, and tangent, the graphs of sine, cosine, and tangent, basic trigonometric identities, trigonometric values of special angles, and more.
- Graphs of trigonometric functions (Khan Academy) - Opens in a new windowVideo tutorials on the graphs of sine, cosine, and tangent, amplitude, midline, and extrema of sinusoidal functions, period of sinusoidal functions, graphing sinusoidal functions, and constructing sinusoidal functions.
- Trigonometric equations and identities (Khan Academy) - Opens in a new windowVideos on trig identity reference, inverse trigonometric functions, solving basic and advanced sinusoidal equations, solving sinusoidal models, trigonometric angle addition identities, and using trigonometric identities to solve problems.
- Trigonometry at Wolfram MathWorld - Opens in a new windowAn extensive, encyclopedia-style resource including definitions and explanations of trigonometry concepts and terms.
Books & eBooks
Algebra and Trigonometry - Opens in a new window by Call Number: QA154.2 .S59 1991ISBN: 9780130258182
Basic Mathematical Skills with Geometry - Opens in a new window by Call Number: QA107 .B3815 2001 (Perth)ISBN: 9780072316926
Geometry the Easy Way - Opens in a new windowCall Number: QA455 .L35 1997ISBN: 9780764101106Publication Date: 1997-08-18
Schaum's Easy Outline of Trigonometry - Opens in a new window by Call Number: QA531 .A974 2002ISBN: 9780071383189
Schaum's Outline of Geometry - Opens in a new window by Call Number: QA445 .R53 2000ISBN: 9780070527669
The Britannica Guide to Algebra and Trigonometry - Opens in a new window by Call Number: QA155 .B75 2011ISBN: 1615302190
The Britannica Guide to Geometry - Opens in a new window by Call Number: QA443.5 .B75 2011ISBN: 1615302174
Practice Makes Perfect Geometry - Opens in a new window by Call Number: QA461 .W44 2010ISBN: 007163813X- Schaum's Outline of Geometry - Opens in a new window by Call Number: QA445 .R53 2000ISBN: 9780070527669
Schaum's Outline of Theory and Problems of Trigonometry - Opens in a new window by
Call Number: QA531 .A97 1999 ebookISBN: 0585315280
Trigonometry for Dummies® - Opens in a new window by Call Number: QA531 .S783 2014ISBN: 9781118827574
