Question

Can someone plzz help me

Answer 1

For this case we have that by definition of trigonometric relations of a rectangular triangle that, the sine of an angle is given by the opposite leg to the angle on the hypotenuse of the triangle.

That is to say:

$Sin (30) = \frac {IR} {14}$

We clear the length of the leg:

$IR = 14 * sin (30)\\IR = 14 * \frac {1} {2}\\IR = 7 \ in$

Answer:

$IR = 7 \ in$