 | Thomas Achatz, John G. Anderson - Mathematics - 2005 - 584 pages
...conditions of Theorem 1 8- 1 are satisfied, then the third pair of angles are also equal in measure since the sum of the measures of the interior angles of any triangle must be 180. Also notice that in the case of right triangles the conditions of Theorem 1 8- 1 are satisfied... | |
 | Stan Gibilisco - Technology & Engineering - 2010 - 434 pages
...(b) it would imply that the measure of ZCAD is something other than 40°, but it must be 40° because the sum of the measures of the interior angles of any triangle is 180°. (c) the measure of ZABC is 40° because AABC is an isosceles triangle. (d) of a rush to judgment!... | |
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The sum of the measures of the interior angles of any triangle is 180°. 