Add Area Of Trapezoid (#419)

* Added area_of_trapezoid.

* Fixed spacing in file.

* Move area of trapezoid to latest gen_list

---------

Co-authored-by: Luke Weiler <lukew25073@gmail.com>

mathgenerator/_gen_list.py

@@ -128,4 +128,5 @@ gen_list = [
     ("simplify_square_root", "basic_math"),
     ("line_equation_from_2_points", "algebra"),
     ("orthogonal_projection", "algebra"),
+    ("area_of_trapezoid", "geometry"),
 ]

mathgenerator/geometry.py

@@ -104,6 +104,24 @@ def area_of_circle_given_center_and_point(max_coordinate=10, max_radius=10):
     return problem, f'${area}$'
 
 
+def area_of_trapezoid(max_len=20):
+    r"""Area of Trapezoid
+
+    | Ex. Problem | Ex. Solution |
+    | --- | --- |
+    | Area of trapezoid with height $12$ and base lengths: $3, 7, = $ | $60$ |
+    """
+    a = random.randint(1, max_len)
+    b = random.randint(1, max_len)
+    h = random.randint(1, max_len)
+
+    area = (a + b) * h / 2
+
+    problem = f"Area of trapezoid with height ${h}$ and base lengths: ${a}, {b}, = $"
+    solution = f'${round(area, 2)}$'
+    return problem, solution
+
+
 def area_of_triangle(max_a=20, max_b=20):
     r"""Area of Triangle