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sahil
Yes! it is true that the problem did not mention that triangle is a`right`triangle but the problem did mention that `h` is the height! And a height is perpendicular to base and creates two 90 degree angles; this properties is sufficient to say that we are dealing with a `right` triangle.
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Side Vs Height

Rather than 2 sides, they say height and base, for any triangle height is 90degrees to the base.
so, we will be able to find the Hyp and hence the perimeter.

So C.

(But if these were sides, it will be E.)
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