Respuesta :

thegamerboi13

Answer:

r=60°

Step-by-step explanation:

Both of the angles together make up 90°. we know this because of the red little box denoting 90°.

If one of the angles is 30°, to find the other one, simply subtract 30 from 90.

90-30=60

r=60°
60 (degrees)

It’s 60 degrees because it’s a right angle (90 degrees) and subtracting 30 from 90 gives us 60.