What is the curved rectangular wedge in a dome called?

Ineed someone to describe what they mean in the instructions !

Writing: article there are always new structures being erected. one new project is china’s central television building located in beijing, china. the odd-shaped skyscraper designed by dutch architect rem koolhaas is expected to cost nearly $800 million. there are mixed feelings about the structure, most of which are about its shape and size in the middle of the city. you will conduct research about one new construction of your choice. search through local newspapers or online architecture periodicals and select one new building to explore. write an essay addressing the following prompts: • location of new building • purpose and proposed function of new building • cost of construction • architect who designed building • materials used to construct building • reaction by others • expected completion date • include an image or link to an image of structure

Which is the most challenging aspect of developing a screenplay? finding an original idea collaborating with a script doctor establishing the key elements of plot selling a finished screenplay