9 class. Geometry0+
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Quadrilaterals and their properties
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Similar triangles.
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Solving right triangles
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Polygons.
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Sine, cosine, tangent of angles from 0° to 180°
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Identities: sin 180°-?=sin ?
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Coordinates of the middle of the segment.
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The equation of a circle and a straight line
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Vector.
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Coordinates of the vector.
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Coordinates of the vector.
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Multiplication of a vector by a number.
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Scalar product of vectors.
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Scalar product of vectors.
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Theorem of cosines.
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Theorem of cosines.
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Theorem of sines
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Formulas for calculating the area of ??a triangle.
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Formulas for calculating the area of ??a triangle.
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Solving triangles
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Solving problems of practical content
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A regular polygon, its types and properties
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Regular polygon and properties
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A regular polygon inscribed in a circle
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A regular polygon circumscribed about a circle
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Correct polygon, solving problems
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Circuit.
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Area of ??a circle and its part
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Solving problems of practical content
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Movement and its properties
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The symmetry is relatively direct
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Symmetry with respect to a point
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Turn
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Parallel transfer
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Equality of figures
2020Online School, Documentary, Education, Ukraine
Full HD253 minutes
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