There is a triangle on it. What are the constellations of ten stars?

Cepheus is an inverted house shape, but the bottom is triangular and the top is rectangular.

But a total of ten stars is definitely not accurate. There are countless stars in the sky of all constellations, some you can see, some you can't see with the naked eye but you can see with a telescope, and some you can't see now because of insufficient technology. They are all stars of this constellation. So a constellation has no definite number of stars, nor can it be said that there are only ten stars. Generally speaking, the stars connecting the constellations can be summarized. For example, Orion has seven main stars, but it cannot be said that Orion has only seven stars.

According to this idea,

Cepheus should be eight stars.