diff --git a/rust/pyo3-geoarrow/src/scalar/bounding_rect.rs b/rust/pyo3-geoarrow/src/scalar/bounding_rect.rs
index fdcef08ca..8226b46d2 100644
--- a/rust/pyo3-geoarrow/src/scalar/bounding_rect.rs
+++ b/rust/pyo3-geoarrow/src/scalar/bounding_rect.rs
@@ -1,9 +1,9 @@
 use std::ops::Add;
 
 use geo_traits::{
-    CoordTrait, GeometryCollectionTrait, GeometryTrait, GeometryType, LineStringTrait,
+    CoordTrait, GeometryCollectionTrait, GeometryTrait, GeometryType, LineStringTrait, LineTrait,
     MultiLineStringTrait, MultiPointTrait, MultiPolygonTrait, PointTrait, PolygonTrait, RectTrait,
-    UnimplementedGeometryCollection, UnimplementedLine, UnimplementedLineString,
+    TriangleTrait, UnimplementedGeometryCollection, UnimplementedLine, UnimplementedLineString,
     UnimplementedMultiLineString, UnimplementedMultiPoint, UnimplementedMultiPolygon,
     UnimplementedPoint, UnimplementedPolygon, UnimplementedTriangle,
 };
@@ -108,6 +108,18 @@ impl BoundingRect {
         }
     }
 
+    pub fn add_triangle(&mut self, triangle: &impl TriangleTrait<T = f64>) {
+        for coord in triangle.coords() {
+            self.add_coord(&coord);
+        }
+    }
+
+    pub fn add_line(&mut self, line: &impl LineTrait<T = f64>) {
+        for coord in line.coords() {
+            self.add_coord(&coord);
+        }
+    }
+
     pub fn add_geometry(&mut self, geometry: &impl GeometryTrait<T = f64>) {
         use GeometryType::*;
 
@@ -120,7 +132,8 @@ impl BoundingRect {
             MultiPolygon(g) => self.add_multi_polygon(g),
             GeometryCollection(g) => self.add_geometry_collection(g),
             Rect(g) => self.add_rect(g),
-            Triangle(_) | Line(_) => todo!(),
+            Triangle(g) => self.add_triangle(g),
+            Line(g) => self.add_line(g),
         }
     }