how to calculate the alternating angles
how to calculate the corresponding angles
how to calculate the allied angles
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alternate angles are those angles that have different vertices and lie on the alternate sides of the transversal
Corresponding angles are equal if the transversal intersects two parallel lines. If the transversal intersects non-parallel lines, the corresponding angles formed are not congruent and are not related in any way.
The allied angle (180o – θ) is in the second quadrant and 180o = 2 x 90o is even multiplicative of 90o, so the trigonometric ratios sin and cosec of (180o – θ) will be positive and other will be negative and all the trigonometric ratios remain same
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