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To convert a degree measure to radian measure, we will need to multiply it by  π/180 because one radian is equal to π/180, and exactly 180 degrees.

Given the degree measure of 145, we can multiply it by π/180 and simplify it.

145° × π/180 = 145π/180

145π/180 can be simplified to 29π/36.

Therefore, the radian measure 29π/36 (third choice) is equal to 145 degrees.

Option C:  [tex]\dfrac{29\pi}{36}[/tex] is the radian measure of  145 degrees.

Radian is a measure which takes a full circular rotation ( 360 degrees ) as 2π radians.

or symbolically:

[tex]360^{\circ}=2\pi^c \\\\1^{\circ} = (\dfrac{\pi}{180})^{c\\[/tex]

Thus, converting 145 degrees to radian will be as follows:

[tex]1^{\circ} = (\dfrac{\pi}{180})^c\\145^{\circ} = 145 \times (\dfrac{\pi}{180})^c\\\\or\\145^{\circ} = (\dfrac{29\pi}{36})^c[/tex]

Thus, Option C: [tex]\dfrac{29\pi}{36}[/tex] is the radian measure of  145 degrees.

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