What is the best definition of Engineering Shear Strain (γij)?

What is the best definition of Engineering Shear Strain (γij)? Correct Answer It is the total angle of shearing under a state of simple shear

The Engineering Shear Strain is defined as the total angle of the shearing under the state of simple shear. It implies that it is always accompanied with a rotation of an element. It differs from the tensor shear strain in the way that tensor shear strain doesn’t accompany any form of rotation.
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Related Questions

Shear stress versus shear rate behavior of four different types of fluids (I, II, III and IV) are shown in the figure below.
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Which one of the following options is correct?
The strain energy stored in a body due to shear stress, is (where $$\tau $$ = Shear stress, C = Shear modulus and V = Volume of the body)