Since two circles, parabolas, or rectangular hyperbolas always have the same eccentricity ( specifically 0 in the case of circles, 1 in the case of parabolas, and \ sqrt { 2 } in the case of rectangular hyperbolas ), two circles, parabolas, or rectangular hyperbolas need to have only one other common parameter value, establishing their size, for them to be congruent.
22.
Since two circles, parabolas, or rectangular hyperbolas always have the same eccentricity ( specifically 0 in the case of circles, 1 in the case of parabolas, and \ sqrt { 2 } in the case of rectangular hyperbolas ), two circles, parabolas, or rectangular hyperbolas need to have only one other common parameter value, establishing their size, for them to be congruent.
23.
Since two circles, parabolas, or rectangular hyperbolas always have the same eccentricity ( specifically 0 in the case of circles, 1 in the case of parabolas, and \ sqrt { 2 } in the case of rectangular hyperbolas ), two circles, parabolas, or rectangular hyperbolas need to have only one other common parameter value, establishing their size, for them to be congruent.
