2 answers:
Answer:
Step-by-step explanation:
In ΔABC ,
∠A + ∠ACB + ∠B = 180 {Angle sum property of triangle}
40 + 90 + ∠B = 180
130 + ∠B = 180
∠B = 180 - 130
∠B = 50
In ΔBFD ,
∠D + ∠B + ∠BFD = 180
x + 50 + 100 = 180
x + 150 = 180
x = 180 - 150
x = 30°
Step-by-step explanation:
In traingle ABC
Now
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Step-by-step explanation:
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Answer: 502.655
Step-by-step explanation:
just search cylinder calculator
(0,-4.69) i hope this is correct