"Sharp angles" refers to angles that are less than 90 degrees, making a sharp point. It can also be used to describe something that is very angular or has a strong, distinct shape.
Sentences with «sharp angles»
The slick lines and sharp angles of this design will complement other minimalist furniture perfectly. (idealhome.co.uk)
It's home to 80 artists; a huge grey building with sharp angles, and concrete walls. (blog.folksy.com)
They even go as far as saying the blue tint can only be seen at sharp angles, but I found it showed up in most angles. (knowtechie.com)