Geometry

SchoolTutoring Academy
February 20, 2012
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Triangle Inequality Theorem

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The Triangle Inequality theorem states that: “The sum of the lengths of any two sides of a triangle is greater than the length of the third side.” Otherwise, a triangle…

SchoolTutoring Academy
February 2, 2012
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Tangent to a Circle

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The tangent to a circle is a line circle that intersects the circle in exactly one point. The point where the tangent touches the circle is the point of…

SchoolTutoring Academy
January 31, 2012
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Inscribed Angle and Conjectures

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An inscribed angle is an angle formed by two chords in a circle which meet at a common point. This common endpoint forms the vertex of the inscribed angle. The…

SchoolTutoring Academy
January 30, 2012
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Heron’s Formula: Area of a Triangle

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Heron’s formula is used to calculate the area of a triangle if all three sides are known. It is called “Heron’s Formula” after Hero of Alexandria who was a Greek…

SchoolTutoring Academy
January 27, 2012
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Types of Triangles

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Triangles are polygons with 3 sides and 3 angles which always add up to 180°. Types of triangles may be classified by their sides, by their angles or by a…

SchoolTutoring Academy
January 20, 2012
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Angles of Polygons

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Polygons are closed geometric figures made with straight lines. Sum of interior angels The sum of the interior angles of a convex polygon of ‘n’…

SchoolTutoring Academy
January 20, 2012
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Types of Polygons

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The word ‘polygon’ is derived from Greek words poly- which means ‘many’ and -gon means ‘corner’ or ‘angle’. Polygons are closed (all the lines joined) geometric figures made of straight…

SchoolTutoring Academy
January 4, 2012
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Converting between Radians and Degrees

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Radian and Degree are the most commonly used units to measure angels. Angle in degrees is denoted by symbol ° e.g. 50°. The radian is represented by ‘rad’ or by…

SchoolTutoring Academy
December 29, 2011
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Sector of a Circle: Understanding Key Terminology

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A sector of a circle is an area enclosed by two radii and an arc. In the figure above, θ is the central angle and r are the radii of…

SchoolTutoring Academy
December 28, 2011
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Solving for the Hypotenuse: The Pythagorean Theorem

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According to Pythagorean Theorem, in a right triangle the square of the hypotenuse is equal to the sum of the squares of the other two sides. In the triangle…

Triangle Inequality Theorem

Tangent to a Circle

Inscribed Angle and Conjectures

Heron’s Formula: Area of a Triangle

Types of Triangles

Angles of Polygons

Types of Polygons

Converting between Radians and Degrees

Sector of a Circle: Understanding Key Terminology

Solving for the Hypotenuse: The Pythagorean Theorem

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