Well, I don't have any particular knowledge, other than living in and around DC for a long time.
If you look at the neighborhoods to the west of Kalorama on Google Maps [1], bounded by Rock Creek, they are Kalorama Heights and Kalorama Triangle Historic district, which I think most locals would just consider Kalorama. Although I think a lot of people would consider most of the lower triangle to be part of Dupont Circle rather than Kalorama.
There's also this map [2] which, admittedly, is not trying to be an official map of anything, but it is an artwork featured in one of the DC government buildings. It shows Kalorama more as a single triangle.
If you look at the neighborhoods to the west of Kalorama on Google Maps [1], bounded by Rock Creek, they are Kalorama Heights and Kalorama Triangle Historic district, which I think most locals would just consider Kalorama. Although I think a lot of people would consider most of the lower triangle to be part of Dupont Circle rather than Kalorama.
There's also this map [2] which, admittedly, is not trying to be an official map of anything, but it is an artwork featured in one of the DC government buildings. It shows Kalorama more as a single triangle.
[1] https://imgur.com/a/WNii05X [2] https://imgur.com/a/QprVzJm