Parallelogram Calculator

Basea：
Baseb：
Height (h)：
Angle (θ)：
Area:
Perimeter:
Short diagonal:
Long diagonal:
1. Area = bh = absinθ

2. Perimeter = 2a + 2b

3. Short diagonal = sqrt(a2 + b2 - 2abcos(θ));

4. Long diagonal = sqrt(a2 + b2 - 2abcos(π - θ));