1 files changed, 9 insertions, 0 deletions
diff --git a/triangle.c b/triangle.c
new file mode 100644
index 0000000..3fc0cc9
--- /dev/null
+++ b/triangle.c
@@ -0,0 +1,9 @@
+#include <u.h>
+#include <libc.h>
+#include <geometry.h>
+
+Point3
+centroid(Triangle3 t)
+{
+	return divpt3(addpt3(t.p0, addpt3(t.p1, t.p2)), 3);
+}