Circular 4690

The cone shell with a base radius of 20 cm and a height of 50 cm unfolds into a circular cutout. How big is the center angle of this cutout?

Correct answer:

x =  133.7006 °

Step-by-step explanation:

r=20 h=50 s=r2+h2=202+502=10 2953.8516 S1 = π  r  s S2 = π   s2 x1 = 360   S1/S2 x=360 r/s=360 20/53.8516=133.7006=133°422"

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