It is correct and can be used in written English.
For example, "This mountain is in the shape of a triangle."
Jones, 35, is in the shape of her life.
It is in the shape of an angel.
One (pictured) is in the shape of a pyramid.
When visitors stand underneath, they'll see it is in the shape of Britain.
I love that her handbag is in the shape of a Yorkshire terrier.
This year the maze is in the shape of the Thunderbird 2 aircraft.
In fact, the museum is in the shape of an ancient Chinese bronze ritual vessel called a ding.
The trail is in the shape of a lollipop with a three-mile section leading to a seven-mile loop.
There is a mushroom cloud of anger over Manhattan that is in the shape of Betsy Andreu.
If that is in the shape of this season's Champions League, the memory of 1998's Cup Winners' Cup may finally take a back seat.
Some is in the shape of interest-free loans, while the denial of basic labour rights, such as joining a union, drives down pay and costs.
