Solution:
Given, In ΔDEF, DE = 12√3 cm, |
To find:
The measurement of EF
By formula,
Area of ΔDEF = \(\frac12DE\times EF\times\sin\left(60\right)\)
Or, 36 cm2 = \(\frac1212\sqrt3\times EF\times\frac{\sqrt3}2\)
Or, 36 cm2 = 9cm x EF
Or, EF = 4cm
∴ The measurement of EF is 4cm is the required answer