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Name the types of triangles formed in tw...

Name the types of triangles formed in two different ways in each of the following :
(i) A triangle in which one angle is of `90^(@)`, and the other two angles are equal.
(ii) A `Delta` ABC with `m angle A = 40^(@), m angle B = 60^(@) and m angle C = 80^(@)`.
(iii) A triangle in which one angle is obtuse and the other two angles are equal.

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MTG IIT JEE FOUNDATION-UNDERSTANDING ELEMENTARY SHAPES -SOLVED EXAMPLES
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  16. Half of a revolution is straight angle.

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  17. A right angle is 1/2 of a revolution.

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