three. there are 2 obtuse
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it has no acute angles
The letter 'H' has 8 angles. Each of the two vertical lines has two right angles, and the horizontal line has four angles (two acute angles and two obtuse angles). So, altogether, the letter 'H' has 8 angles.
There are no acute angles in a rectangle which has 4 equal interior right angles
There can be 10 obtuse angles. If there are no reflex angles there can by up to three acute angles (I think).
None.