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The length of the arc , as in the picture, is 22 cm and O is the center of the circle. The perimeter of the circle (circumference) is:
circle with short arc AB 45 deg

a) 990 cmb) 67 cmc) 176 cm
d) 88 cme) none of these answers


 


What is the radius of the following circle which center is O, given that:
AB = 3x - 3 and OA = x + 3.
circle which center is O and diameter is AB

 


Find x in the following cases:
a) s is perpendicular to
circle of center O with chord AB and line s perpendicular to AB
b) and are tangent segments to the circle
external point P intersection of two tangent segments to the circumference with center O

 


The circles in the picture are externally tangent. The distance between the centers is 28 cm and the difference between their radii is 8 cm. Find the length of each radius.

 


Knowing that O is the center of the circle, find x in the following cases:
a)
b)