Respuesta :

rawnutmeg

arc length = radius multiplied by angle in radians

radius = 7 angle = 90 degrees

90 degrees = 1.571 radians

7 × 1.571 = 10.997

AB is 10.997 or 11 inches long
If two angles have equal measures, then the sides opposite to them are equal in length. So the length of side AB is 6 units