Answer:
Can you explain more?
Step-by-step explanation:
Answer:
b = 60
Step-by-step explanation:
The sum of the angles of a triangle are 180
80+40+b = 180
Combine like terms
120+b =180
Subtract 120 from each side
b = 180-120
b = 60
Answer:47.25
Step-by-step explanation: it is 10.5 x the 4.5