The angle θ used in the stress transformation equations for the inclined surface AB shown on the stress element is positive

• True

• False

The angle θ used in the stress transformation equations is positive when measured counterclockwise from the x-direction
to the n-direction.

• True

• False

What is the correct value of θ for the inclined surface?

• Plus 60

• • Minus 60

• Minus 30

• • Plus 30

What is the correct value of θ for the inclined plane shown?

• Plus 70

• Minus 70

• Plus 20

• Plus 30

What is the correct value of θ for the inclined plane shown?

• Minus 55

• Plus 65

• Minus 35

• None of these angles

What is the correct value of θ for the inclined plane shown? (you will need to do some Trig !)

• Plus 63.4

• Minus 63.4

• Minus 26.6

• Plus 26.6

What is the correct value of θ for the inclined plane shown?

• Plus 40

• Plus 50

• Plus 140

• None of these angles

What is the correct value of θ for the inclined plane shown?

• Plus 53.1

• Minus 53.1

• Plus 36.9

• Minus 36.9

Mark in the where the compressive stresses are in this stress element