Respuesta :

Answer:6.5

Step-by-step explanation:

Angle C is 90° therefore we can apply Pythagoras principle to get the diameter Of The circle

Diameter=√(12^2+5^2)

Diameter=√(12x12+5x5)

Diameter=√(144+25)

Diameter=√(169)

Diameter=13

Radius=diameter ➗ 2

Radius=13 ➗ 2

Radius=6.5