Trapezoidal calculator

Parallel side a:
Parallel side b:
Angle (θ):
Angle(Φ):
Height(h):
area:
perimeter:
Side c:
Side d:
Diagonal L1H2：
Diagonal H1L2：

Trapezoidal formula
1. Area = h(a+b)/2

2. Circumference = a + b + c + d

3. Diagonal L1H2 = sqrt(h2+(b-sqrt(c2-h2))2)

4. Diagonal H1L2 = sqrt(h2+(b-sqrt(d2-h2))2)