Question

the diagram shows a triangle.
what is the value of ( b )?
( b = square^circ )

Explanation:

Step1: Sum angles to 180°

$6b + 5b + 4b = 180$

Step2: Combine like terms

$15b = 180$

Step3: Solve for b

$b = \frac{180}{15}$

Answer:

$12$