Question

The question is asked of the photo

Answer 1

Pythagoras Theorem:
 $\boxed { \boxed {a^2 + b^2 = c^2 \beta }}$

Apply Pythagoras Theorem:

a² + 6² = 11²

a² = 11² - 6²

a²= 85

a = √85

a = 9.22 (nearest hundredth)

Answer: RT = 9.22 cm