Part, Question

 1   1, 12  |   that a triangle has three angles equal to two right angles, ~
 2   1, 12  |   angles equal to two right angles, ~he comprehends that truth;
 3   1, 81  |     necessary for the three angles of a triangle to be ~equal
 4   1, 81  |   to be ~equal to two right angles. And this is "natural" and "
 5   2, 33  |     instance that the three angles of a ~triangle are together
 6   2, 33  | together equal to two right angles." In the first sense, ~however,
 7   2, 94  | true for all that the three angles of a triangle ~are together
 8   2, 94  | together equal to two right angles, although it is not known
 9 Suppl, 80|    instance that the ~three angles of a triangle should not
10 Suppl, 80|   not be equal to two right angles. In ~like manner nothing
11 Appen1, 2|  triangle having its ~three angles equal to two right angles,
12 Appen1, 2|   angles equal to two right angles, and while engaged in this