There are 4 ninety degree right angles
There are 3 right angles in the letter F
4
3 right angles.
Looks like 4 where the horizontal bar meets the vertical bars.
None in lower case h but there are 4 right angles in upper case H
Both do.
There are 4 ninety degree right angles
As a capital letter M it has three angles
4 angles
Probably E - since it has four right-angles.
There are 3 right angles in the letter F
In the upper-case letter A? I see none, nor in lower case a either.
The letter "N" as two acute angles.
It has 3 interior angles
3 right angles.
There are no right angles in the letter "e".