Relations entre les angles d'un triangle
 |
 +
 +
 =
 (180°)1 =
+
1 =
+
1 =
+
1 +
1 +
1 =
2 (360°) |
Relations entre les angles d'un triangle
|
+
+
=
(180°)1 =
+
1 =
+
1 =
+
1 +
1 +
1 =
2 (360°) |
1,
1,
1 angles
externes au triangle.
