B is the length of the base. 12 d1d2 Substitute 16 for d1 and 30 for d2. 2 cm 2 x sine 33 4 cm 2 x 055 22 cm 2.
You can use any interior angle because either they are equal or they are supplementary and supplementary angles have the same sine.
Area of a rhombus To calculate the area of a rhombus draw the surrounding rectangle. The area of the rhombus is 22 cm 2. Derivation for Rhombus Area Formula. A rhombus is just a fancy name for a diamond.