Two angles, formed when a line crosses two other lines, that lie on opposite sides of the transversal line and on opposite relative sides of the other lines. If the two lines crossed are parallel, the alternate angles are equal. Alternate interior angles: Alternate interior angles are the pair of angles lying in the region between the two lines (intersected by a transversal) and on the opposite sides of the transversal but one below the transversal and the other above the transversal. In the adjoining figure
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Illustration: Find the angle which is alternate to :
Solution:
Illustration: In the given figure m || n and Solution: Let the common factor be x |
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Illustration: In the given figure, PQ and RS are two mirrors placed parallel to each other . An incident ray AB strikes the mirror PQ at B, the reflected ray moves along the path and strikes the mirror RS at C and again reflects back along CD. Prove that AB || CD.
Solution:
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Right Option : A | |||
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Right Option : D | |||
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Right Option : D | |||
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