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  1. Basic Geometry | Khan Academy

    This Basic geometry and measurement course is a refresher of length, area, perimeter, volume, angle measure, and transformations of 2D and 3D figures. If you are learning the content for the first time, …

  2. High school geometry - Khan Academy

    Learn high school geometry—transformations, congruence, similarity, trigonometry, analytic geometry, and more (aligned with Common Core standards).

  3. Geometry (all content) - Khan Academy

    Unit 13: Trigonometry Special right triangles Introduction to the trigonometric ratios Solving for a side in a right triangle using the trigonometric ratios Solving for an angle in a right triangle using the …

  4. Angles | Geometry (all content) | Math | Khan Academy

    Geometry (all content) 17 units · 180 skills Unit 1 Lines Unit 3 Shapes Unit 4 Triangles

  5. Get ready for Geometry - Math | Khan Academy

    Get ready for high school geometry! Learn the skills that will set you up for success in congruence, similarity, and triangle trigonometry; analytic geometry; conic sections; and circles and solid geometry.

  6. Terms & labels in geometry (video) | Khan Academy

    Learn key geometric terms like colinear points, midpoints, and vertices, and enhance your knowledge of geometry. Improve your skills and discover the world of shapes and space.

  7. Introduction to the coordinate plane (video) | Khan Academy

    Introduction to the coordinate plane Google Classroom Microsoft Teams About Transcript

  8. Performing transformations | High school geometry - Khan Academy

    Intro to Euclidean geometry Learn Getting ready for performing transformations Euclid as the father of geometry

  9. Trigonometry | Geometry (all content) | Math | Khan Academy

    Not only are right triangles cool in their own right (pun intended), they are the basis of very important ideas in analytic geometry (the distance between two points in space) and trigonometry.

  10. Get ready: Geometry and trigonometry | Khan Academy

    This unit prepares you for the fundamental geometry and trigonometry skills you'll need for the SAT Math test. Work through the entire lesson for a skill, or take the quiz to cover the whole skill at once.