there must be subtraction of multiplication of each two diagonal,
|G|=[12×2-(-6)×0]
=(24+0)
=24ans
Sin D=35/37
cos D=12/37
tan D= 35/12
Use SOHCAHTOA
Well, you could subtract or add or multiply or divide for example 45 + x=50 you could subtract 50 from 45 and get 5 there are many ways you can find missing values.