The triangle is right angles triangle,
So we can use sin theta here as,
[tex] sin R = \frac{Perpendicular}{Hypotenuse} [/tex]
We are given from figure,
Perpendicular = 5cm and hypotenuse =13cm
Plugging these in the formula,
[tex] sin R = \frac{5}{13} [/tex]
sin R =0.3846
Now here we take sin inverse to get the value of angle R,
R = 22.6189 degrees.
Answer: Angle R is 22.6189 degrees.
