Trapezoid Calculator with Angles

Parallel Side a:  
Parallel Side b:  
Angle (θ):
Angle (Φ)
Altitude (h):  
 
Area:  
Perimeter:  
Side c:  
Side d:  
Diagonal L1H2:  
Diagonal H1L2:  

In Euclidean geometry, A trapezoid has two parallel sides are called the bases of the trapezoid. The other two sides are calld the lateral sides.

Trapezoid Formulas

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

2. Perimeter = a + b + c + d

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

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

For example, When Parallel Side a =3, b = 4, Angle (θ) = 0.9273, Angle (Φ) = 0.6082, altitude(h) = 4, Then the area= 14, perimeter = 19, Side c = 5, side d = 7, Diagonal L1H2 = 4.1231, Diagonal H1L2 = 4.3641.

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