The answer would be 58
180 - 65 - 57 = 58 which is the missing angle
Answer:


Step-by-step explanation:
Given



Required
The size of
of height 
First, we calculate the width using the following equivalent ratios

Express as fraction

Solve for x


Hence:
--- approximated
So, we have:


The size (diagonal) is then calculated using:




--- approximated
Answer:
Step-by-step explanation:
r≈0.56
a is the surface area is 4