diff --git a/docs/content/development/extensions.md b/docs/content/development/extensions.md
index c58044c96ef..c56ff4f82a6 100644
--- a/docs/content/development/extensions.md
+++ b/docs/content/development/extensions.md
@@ -97,6 +97,8 @@ All of these community extensions can be downloaded using *pull-deps* with the c
 |druid-opentsdb-emitter|OpenTSDB metrics emitter |[link](../development/extensions-contrib/opentsdb-emitter.html)|
 |druid-moving-average-query|Support for [Moving Average](https://en.wikipedia.org/wiki/Moving_average) and other Aggregate [Window Functions](https://en.wikibooks.org/wiki/Structured_Query_Language/Window_functions) in Druid queries.|[link](../development/extensions-contrib/moving-average-query.html)|
 |druid-influxdb-emitter|InfluxDB metrics emitter|[link](../development/extensions-contrib/influxdb-emitter.html)|
+|druid-momentsketch|Support for approximate quantile queries using the [momentsketch](https://github.com/stanford-futuredata/momentsketch) library|[link](../development/extensions-contrib/momentsketch-quantiles.html)|
+|druid-tdigestsketch|Support for approximate sketch aggregators based on [T-Digest](https://github.com/tdunning/t-digest)|[link](../development/extensions-contrib/tdigestsketch-quantiles.html)|
 
 ## Promoting Community Extension to Core Extension
 
diff --git a/docs/content/development/geo.md b/docs/content/development/geo.md
index b482740fbc0..8d6a6cfd744 100644
--- a/docs/content/development/geo.md
+++ b/docs/content/development/geo.md
@@ -91,3 +91,10 @@ Bounds
 |--------|-----------|---------|
 |coords|Origin coordinates in the form [x, y, z, …]|yes|
 |radius|The float radius value|yes|
+
+### PolygonBound
+
+|property|description|required?|
+|--------|-----------|---------|
+|abscissa|Horizontal coordinate for corners of the polygon|yes|
+|ordinate|Vertical coordinate for corners of the polygon|yes|