Theorem 6.9 : In a triangle, if square o...

Theorem 6.9 : In a triangle, if square of one side is equal to the sum of the squares of the other two sides, then the angle opposite the first side is a right angle.

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NCERT-NCERT THEOREMS-THEOREM 6.1

Theorem 6.1 : If a line is drawn parallel to one side of a triangle to...
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Theorem 6.2 : If a line divides any two sides of a triangle in the sam...
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Theorem 6.3 : If in two triangles, corresponding angles are equal, the...
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Theorem 6.4 : If in two triangles, sides of one triangle are proportio...
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Theorem 6.5 : If one angle of a triangle is equal to one angle of the ...
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Theorem 6.6 : The ratio of the areas of two similar triangles is equal...
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Theorem 6.7 : If a perpendicular is drawn from the vertex of the right...
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Theorem 6.8 : In a right triangle, the square of the hypotenuse is equ...
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Theorem 6.9 : In a triangle, if square of one side is equal to the sum...
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