Work out the area of the parallelogram.
Not draw
accurately
13 cm
79°
21 cm

The area of parallelogram can be found by product of its base and height. The calculations are shown below:  

Explanation:

We know that,

Area of parallelogram = base × height

assume base to be 21 cm.

Then,

                 sin 79° =  

             ∴ height = 13 × 0.98 = 12.74

Area of parallelogram = 21 × 12.74

                                    = 267.54

The area of parallelogram is calculated as 267.54 .

it is reliable if two scientists recorded it