document.write( "Question 134188: Find the area and perimeter of the shaded region.
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document.write( "note: The radius of the circle is 4.\r
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document.write( "What I've done:
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document.write( "I know you have to find the area of the small unshaded seg. by doing A seg. = Asec.-A triangle. Then you need to find the area of the semi-circle created by the shaded area and the segment. Then if you subtract the area of the segment from the area of the semi-circle you get the area of the shaded region. I just don't get how to find the area of the semi circle and I don't know what to input into the formula for finding the area of the SEGMENT.
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document.write( "I also have no clue how to find the perimeter of the shaded area!
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document.write( "PLEASE HELP!\r
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Algebra.Com's Answer #98127 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! the diameter of the semicircle is the hypotenuse of the triangle\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the segment area is 1/4 the area of the circle minus the area of the triangle \n" ); document.write( "__ the central angle is 90°\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the perimeter of the shaded area is the length of the outer side (which is the circumference of the semi-circle) \n" ); document.write( "__ plus the length of the inner side (which is 1/4 the circumference of the large circle) \n" ); document.write( " |