The height of a semisphere is equal a radius of this hemisphere.
But... if we can talk about the height of the hemisphere ;)
R = 0.8m = 80cm then height of hemisphere is equal 0.8m = 80cm.
There, radius = height.
So** Height = 0,8 m = 80 cm**
The height of a hemisphere is equal to its radius. For a hemisphere with a radius of 0.8 m, the height is 0.8 m (or 80 cm). Therefore, the height of the hemisphere is 80 cm.
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