I softly call her a "right angel".
A right angle measures 90 degrees.
acute angel
An acute angle measures <90o
An angle that measures to precisely 90o is called a right angle.
If it measures 90 degrees, then it is called a right angle.
The corner of a square measures 90 degrees which is a right angle.
150 degrees
90 degrees
a right angle measures 90 degrees
90+90+90+90
Acute is < 90 degrees.
Two angles whose measures have a sum of 90 degrees are called complementary angles. For example, if one angle measures 30 degrees, its complement would measure 60 degrees. Complementary angles can be adjacent or separate, and they are often used in various geometric contexts.