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-rw-r--r--doc/sources/c++/triangle.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/sources/c++/triangle.cpp b/doc/sources/c++/triangle.cpp
index 96185d0..008d679 100644
--- a/doc/sources/c++/triangle.cpp
+++ b/doc/sources/c++/triangle.cpp
@@ -1,4 +1,4 @@
-#include "polygon.hpp"
+#include "polygon.h"
#include <cmath>
class triangle : public polygon