Description : What is the area of a quadrilateral in which angle 109 degrees is between sides 0.38cm and 0.69cm when adjacent angle 123 degrees is between sides 0.38cm and 0.42cm?
Last Answer : Here's how I solve it using the Sine and Cosine rules, and area of a triangle based on sine of angle between two given lengths:Let the quadrilateral be ABCD with ADC = 109°, DCB = 128°, ... the area of the 4 sided quadrilateral works out as 0.305 square cm rounded to three decimal places.