Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Secants and Translations

9th - 10th
Demonstrates solutions to problems #76-80 of California Geometry released state test questions. Problems address tangents to circles, secants to circles, intercepted arcs, translations on the coordinate plane, and rotations on the...
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Similar Triangles 1

9th - 10th
This video tutorial [12:55] demonstrates solutions to problems #10-14 of California Geometry released state test questions. Problems address understanding of counterexamples, properties of quadrilateral diagonals, and similar triangles.
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Triangles and Parallelograms

9th - 10th Standards
In this video lesson [11:14], the instructor demonstrates solutions to problems #21-25 of California Geometry released state test questions. Problems address understanding of the triangle inequality theorem, angle relationships with...
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Exterior Angles

9th - 10th
Demonstrates solutions to problems #41-45 of California Geometry released state test questions. Problems address finding volumes of rectangular prisms, exterior angles, interior angle sum, and exterior angle sum. [10:53]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Proof by Contradiction

9th - 10th Standards
Demonstrates solutions to problems #4-6 of California Geometry released state test questions. Problems address understanding of proof by contradiction and proving triangles congruent. [11:56]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Pythagorean Theorem, Area

9th - 10th Standards
Demonstrates solutions to problems #36-40 of California Geometry released state test questions. Problems address understanding of area and knowledge of the area formulas for trapezoids, squares, parallelograms, and triangles. [10:44]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Deducing Angle Measures

9th - 10th Standards
Demonstrates how to solve five different problems from a released California Geometry state test that involve finding the measures of angles in different polygons. This video also appears in the Geometry: Worked Examples section. [10:58]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Pythagorean Theorem, Compass Constructions

9th - 10th Standards
This video tutorial demonstrates solutions to problems #51-55 of the California Geometry released state test questions. Problems address proving and using the Pythagorean theorem and compass constructions. [12:35]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Circle Area Chords Tangent

9th - 10th
Demonstrates solutions to problems #71-75 of California Geometry released state test questions. Problems address Pythagorean theorem, 45-45-90 triangles, 30-60-90 triangles, circumscribed polygons, area, chord length, tangents to circles...
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: More on Congruent and Similar Triangles

9th - 10th Standards
Demonstrates solutions to problems #17-20 of California Geometry released state test questions. Problems address understanding of similar triangles, parallelograms and properties of the diagonals of parallelograms. [11:11]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Deductive Reasoning

9th - 10th Standards
Demonstrates solutions to problems #1-3 of California Geometry released state test questions. Problems address understanding of deductive reasoning and congruent angles created by parallel lines cut by a transversal. [10:17]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Area, Circumference, Volume

9th - 10th Standards
Demonstrates solutions to problems #31-35 of California Geometry released state test questions. Problems address understanding of perimeter, volume, surface area, area, and Pythagorean theorem. [10:53]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Compass Construction

9th - 10th Standards
Demonstrates solutions to problems #56-60 of the California Geometry released state test questions. Problems address compass constructions, slope of perpendicular lines, and using the distance formula. [12:49]
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: More Trig

9th - 10th Standards
The video tutorial [12:21] demonstrates solutions to problems #66-70 of California Geometry released state test questions. Problems address basic trigonometry ratios, 30-60-90 triangles.
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: More Proofs

9th - 10th Standards
Demonstrates solutions to problems #7-10 of California Geometry released state test questions. Problems address understanding of congruent angle pairs when parallel lines are cut by a transversal, counterexamples, and properties of the...
Instructional Video
Khan Academy

Khan Academy: Ca Geometry: Basic Trigonometry

9th - 10th Standards
Demonstrates solutions to problems #61-65 of California Geometry released state test questions. Problems address the equation of a circle, basic trigonometry. [11:04]