diff --git a/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt b/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt
index 85e0f10ff6e..b8552b601ab 100644
--- a/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt
+++ b/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt
@@ -153,7 +153,7 @@ algorithm while preserving the detected sharp edges
 is given in \ref Polygon_mesh_processing/delaunay_remeshing_example.cpp
 
 \paragraph Decimate Remeshing of (Almost) Planar Patches
-If a triangulated surface mesh uses a lot of triangles to described some planar regions of a model, it is possible to simplify
+If a triangulated surface mesh uses a lot of triangles to describe some planar regions of a model, it is possible to simplify
 those parts using the function `CGAL::Polygon_mesh_processing::remesh_planar_patches()`.
 For simply connected patches, it is even possible to not retriangulate them.
 The coplanarity and collinearty tests being exact, almost coplanar patches will not be detected by default. It is possible to specify a
@@ -161,7 +161,7 @@ threshold on the angle between adjacent faces (resp. segments) so that they are
 coplanarity and collinearity tolerance is only local and there is no global control (think of the classical example of a circle arc
 densely sampled: 3 consecutive points are seen as almost collinear while all the points on the arc are not). To circumvent this situation,
 we also provide the function `CGAL::Polygon_mesh_processing::remesh_almost_planar_patches()` that expects the segmentation into
-planar patches and corner to be provided. The function `CGAL::Polygon_mesh_processing::region_growing_of_planes_on_faces()`
+planar patches and corners to be provided. The function `CGAL::Polygon_mesh_processing::region_growing_of_planes_on_faces()`
 uses the region growing algorithm to detect planar regions in a mesh with global and local criteria. Similarly, the function
 `CGAL::Polygon_mesh_processing::detect_corners_of_regions()` can be used to detect corner vertices on the border of the planar
 regions detected by running the region growing algorithm on border segments of the patch.
@@ -169,7 +169,7 @@ regions detected by running the region growing algorithm on border segments of t
 
 \cgalFigureBegin{decimate_cheese, decimate_cheese.png, decimate_colors.png}
 Remeshing of planar patches in two models. On the right, the output has not been retriangulated and the patch ids
-has been assigned to the input and the output meshes, allowing an identical color scheme.
+have been assigned to the input and the output meshes, allowing an identical color scheme.
 \cgalFigureEnd
 
 \cgalFigureBegin{decimate_rg_sphere, decimate_rg_sphere.png}