I need help with this.

90°

Step-by-step explanation:

The total degrees in a triangle should be 180° so add the two you have.

31+59=90 Then subtract that from what the total should be to know the missing value. 180-90=90

So angle E equals 90°

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answer would be 8.64 or s = 11π/4 inches

step-by-step explanation:

s = r θ  

where s = arc length  

r = radius = 3 inches  

θ = central angle in radians = ( π /180)*165  

s = 3(π/180)*165  

= 8.64 inches