From a56eaa9c61433a63de3ff8dd3c205e6b05ec7bd4 Mon Sep 17 00:00:00 2001
From: Lewis Tian <taseikyo@gmail.com>
Date: Thu, 4 Feb 2021 12:31:31 +0800
Subject: [PATCH] add more shapes

---
 maths/area.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 mode change 100644 => 100755 maths/area.py

diff --git a/maths/area.py b/maths/area.py
old mode 100644
new mode 100755
index bc271db..649351b
--- a/maths/area.py
+++ b/maths/area.py
@@ -10,6 +10,40 @@ def circle_area(radius: float) -> float:
     return math.pi * radius * radius
 
 
+def rectangle_area(length: float, width: float) -> float:
+    """
+    >>> rectangle_area(3, 4)
+    12
+    >>> rectangle_area(3, 0)
+    0
+    >>> rectangle_area(0, 4)
+    0
+    """
+    return length * width
+
+
+def square_area(length: float) -> float:
+    """
+    >>> square_area(4)
+    16
+    >>> square_area(0)
+    0
+    """
+    return length ** 2
+
+
+def triangle_area(length: float, height: float) -> float:
+    """
+    >>> triangle_area(3, 4)
+    6.0
+    >>> triangle_area(3, 0)
+    0.0
+    >>> triangle_area(0, 4)
+    0.0
+    """
+    return length * height / 2
+
+
 if __name__ == "__main__":
     from doctest import testmod