A circular cone piece of cardboard with a diameter of 1 m will be made into a conical hat 44 cm high by cutting a sector off and joining the edges to form a cone. Determine the anglein degree subtended by the sector removed.
From the right triangle
Let:
C1=C_1=C1= circumference of the circle
C2=C_2=C2= circumference of the base of the cone
C=C=C= length of the arc
Then
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