Question 1057122
Since it is a right triangle one angle is {{{90^o}}}
The angle with exterior measure of {{{160^o}}} has interior angle {{{180^o-160^o = 20^o}}}  (sum of supplementary angles is {{{180^o}}})
Finally, the 3rd angle must be {{{180^o - 90^o - 20^o = 70^o}}}   (sum of angles of triangle is {{{180^o}}})