Angles

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Definition and properties of a secant

Definition and properties of scalene triangles

A complex figure has some hidden triangles

Definition of a opposite rays - two rays with a common endpoint that form a straight line .

Definition and properties of isosceles triangles

Included side definition: The common leg of two angles.

Hypotenuse definition: The longest side of a right triangle.

A method for calculating the area of a triangle when you know all three sides.

Definition and properties of equilateral triangles

Definition of equidistant point - a point the same distance from two or more other points

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