| Answer | Crossword Clue |
|---|---|
| DENEB | One of three stars in the Summer Triangle |
| HAZY | One of the three H's in a summer weather forecast |
| simplex | basic geometric element in a Euclidean space, being a line segment in one dimension, a triangle in two dimensions, a tetrahedron in three dimensions, and so on: used in topology and linear programming |
| figures | A shape defined by one or more lines in two dimensions (such as a circle or a triangle), or one or more surfaces in three dimensions (such as a sphere or a cuboid), either considered mathematically in geometry or used as a decorative design |
| DENEB | One vertex of the Summer Triangle |
| DENEB | One of the vertices of the Summer Triangle |
| ALTAIR | Bright star, one corner of "the summer triangle" |
