diff --git a/code/function-contract/behaviors/ex-3-triangle-answer.c b/code/function-contract/behaviors/ex-3-triangle-answer.c
index 4e63535..7a04bdf 100644
--- a/code/function-contract/behaviors/ex-3-triangle-answer.c
+++ b/code/function-contract/behaviors/ex-3-triangle-answer.c
@@ -5,6 +5,7 @@ enum Angles { RIGHT, ACUTE, OBTUSE };
 
 /*@
   requires 0 <= a && 0 <= b && 0 <= c;
+  requires a <= b+c;
   requires a >= b && a >= c; // Note that this condition is not
                              // necessary for the function but
                              // added for this exercise
diff --git a/code/function-contract/modularity/ex-5-triangle-answer.c b/code/function-contract/modularity/ex-5-triangle-answer.c
index 54c67ce..adb4c07 100644
--- a/code/function-contract/modularity/ex-5-triangle-answer.c
+++ b/code/function-contract/modularity/ex-5-triangle-answer.c
@@ -9,6 +9,9 @@ struct TriangleInfo {
 };
 
 /*@
+  requires 0 <= a && 0 <= b && 0 <= c;
+  requires a <= b+c;
+
   assigns \nothing;
 
   behavior equilateral: