From a new gallery to Harvard Art Museums, shows chock full of triangles (and other shapes)

Harvard Art Museums An untitled work by Edna Andrade is part of exhibition opening Saturday at the Harvard Art Museums in Cambridge.

“Edna Andrade: Imagination Is Never Static” opens at Harvard Art Museums on Saturday from pieces the artist’s estate gifted recently to the museum.

Andrade is an icon in the op art movement, which focused on manipulating geometric patterns to create optical illusions and play with human perception.

The exhibition highlights Andrade’s process through the lens of drawing, which was core to her practice and thinking. Andrade was part of “Form Forum,” a salon-style group in Philadelphia that met to discuss mathematics, architecture, design, art and philosophy.

That explains why every piece feels like its own experiment, from the subtle net of rectangles in “