One of several wedge shaped peninsulas around the world is called the Istrian Peninsula.
The Labrador Peninsula has a roughly triangular or wedge shaped with several bays and inlets along its coastline.
A wedge shaped portion of a circle is called a sector.
the wedge shaped writing system is called cuneiform.
cuneiform
the wedge shaped writing system is called cuneiform.
cuneiform
the name of the wedge-shaped writing form is called cuneiform. It consisted of hundreds of wedge-shaped marks cut into damp clay.
Cuneiform
Sector
A sector.
cuneiform
I think you are referencing the writing system which used wedge shaped characters developed by the Sumerians. It is called cuneiform and was used about 2500BCE