Properties of Triangles

There are some notable properties in triangles.

Angles

The sum of angles in a triangle is $180^°$

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If two sides are equal in a triangle, then the angles opposite to them are also equal.

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Sides

In a right triangle, the square of hypotenuse is equal to the sum of the squares of opposite and adjacent sides.

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Common factor Method

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Factorize $x^2-16$

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Evaluate $\displaystyle \large \lim_{x\,\to\,0}{\normalsize \bigg(\dfrac{1}{x^2}-\dfrac{1}{\sin^2{x}}\bigg)}$ without using L'Hospital's rule

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Find the LCM of $8$ and $12$ by the Common multiple method

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