Question 1 : match the term with the correct definition

ellipse a) diagonal cross-section through the widest part of a sphere
circle b) shape created when a semi-circle is rotated about the y−axis
sphere c) diagonal cross-section of a cylinder
great circle d) cross-section parallel to the base of a cone
triangle e) perpendicular cross-section of a cone

question 2: which two-dimensional shape can be rotated about the y-axis to create a cone?

question 3: the cross-section of a square pyramid taken perpendicular to the base that passes through the top vertex produces which two-dimensional shape?