1)the square shown has a perimeter of 32 units. the square is rotated about line k.
what shape is created by the rotation and what is the approximate circumference of the base?
circumference of a circle: c = 2πr
a cone with a base circumference of about 25 units
a cone with a base circumference of about 50 units
a cylinder with a circumference of about 25 units
a cylinder with a circumference of about 50 units
2) the equilateral triangle shown is rotated about line a. each side of the triangle measures 20 mm.
what shape is created by the rotation and what is the approximate circumference of the base?
circumference of a circle: c = 2πr
a cylinder with a circumference of about 63 mm
a cylinder with a circumference of about 126 mm
a cone with a base circumference of about 63 mm
a cone with a base circumference of about 126 mm