国际课程通用中学几何-Geometry

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免费可汗学院通用中学几何-Geometry 原版无字幕无翻译

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免费 Solving a proportion with an unknown variable (example) (07:20)

免费 Exploring scale copies (00:00)

免费 Identifying corresponding parts of scaled copies (00:00)

免费 Corresponding points and sides of scaled shapes (00:00)

免费 Identifying scaled copies (00:00)

免费 Identifying scale factor in drawings (00:00)

免费 Identifying values in scale drawings (00:00)

免费 Scale drawings (00:00)

免费 Ratio word problem: centimeters to kilometers (00:00)

免费 Interpreting a scale drawing (00:00)

免费 Creating scale drawings (00:00)

免费 How to make a scale drawing (00:00)

免费 Scale factors and area (00:00)

免费 Solve a scale drawing word problem (00:00)

免费 Angle basics (06:48)

免费 Complementary and supplementary angles (00:00)

免费 Introduction to vertical angles (00:00)

免费 Angles formed by parallel lines and transversals (00:00)

免费 Identifying parallel and perpendicular lines (00:00)

免费 Figuring out angles between transversal and parallel lines (02:16)

免费 Using algebra to find measures of angles formed from transversal (00:00)

免费 Proof: Sum of measures of angles in a triangle are 180 (00:00)

免费 Equilateral and isosceles example problems (00:00)

免费 Triangle angle example 1 (00:00)

免费 Triangle angle example 2 (00:00)

免费 Triangle angle example 3 (00:00)

免费 Challenging triangle angle problem (00:00)

免费 Finding more angles (00:00)

免费 How to approximate square roots (00:00)

免费 Comparing irrational numbers involving radicals (00:00)

免费 Approximating square roots to hundredths (00:00)

免费 Comparing values with calculator (00:00)

免费 The Pythagorean theorem intro (00:00)

免费 Pythagorean theorem 2 (00:00)

免费 Pythagorean theorem with right triangle (00:00)

免费 Quadrilateral on the coordinate plane (00:00)

免费 Area of parallelogram on coordinate plane (00:00)

免费 Finding coordinates of missing vertex example (00:00)

免费 Example of shapes on a coordinate plane (00:00)

免费 Dimensions of rectangle from coordinates example (00:00)

免费 Coordinates of rectangle example (00:00)

免费 Parallelogram on the coordinate plane (00:00)

免费 Two-variable linear equations and their graphs (00:00)

免费 Checking ordered pair solutions to equations example 1 (00:00)

免费 Checking ordered pair solutions to equations example 2 (00:00)

免费 Graphing solutions to two-variable linear equations example 2 (00:00)

免费 Introduction to slope (00:00)

免费 Positive and negative slope (00:00)

免费 Finding the slope of a line from its graph (00:00)

免费 Graphing a line given point and slope (00:00)

免费 Slope from two ordered pairs example 1 (00:00)

免费 Identifying parallel and perpendicular lines (03:34)

免费 Slope from two ordered pairs example 2 (00:00)

免费 Horizontal & vertical lines (00:00)

免费 Slope from equation (00:00)

免费 Writing equations in all forms (00:00)

免费 Factoring quadratics as (x+a)(x+b) (00:00)

免费 Factoring quadratics as (x+a)(x+b) (example 2) (00:00)

免费 More examples of factoring quadratics with a leading coefficient of 1 (00:00)

免费 Perfect square factorization intro (00:00)

免费 Example 4: Factoring quadratics as a perfect square of a difference: (a-b)^2 (04:53)

免费 Identifying perfect square form (00:00)

免费 Example 3: Factoring quadratics as a perfect square of a sum: (a+b)^2 (03:52)

免费 Factoring perfect squares: missing values (00:00)

免费 Factoring perfect squares: shared factors (00:00)

免费 Introduction to vertex form of a quadratic (00:00)

免费 Graphing a parabola in vertex form (00:00)

免费 Solving quadratic equations by completing the square (00:00)

免费 Example 1: Completing the square (00:00)

免费 Worked example: Rewriting expressions by completing the square (00:00)

免费 Worked example: Solving equations by completing the square (00:00)

免费 Circles: radius, diameter, circumference and Pi (00:00)

免费 Labeling parts of a circle (00:00)

免费 Radius & diameter from circumference (03:35)

免费 Relating circumference and area (00:00)

免费 Area of a circle (00:00)

免费 Partial circle area and arc length (02:59)

免费 Slice a rectangular pyramid (00:00)

免费 Find the volume of a ring (00:00)

免费 Find the volume of a triangular prism and cube (00:00)

免费 Find the volume of rectangles inside rectangles (00:00)

免费 Cylinder volume and surface area (00:00)

免费 Volume of a sphere (00:00)

免费 Volume of a cone (00:00)

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