Triangle hjk is an isosceles triangle. the measures of angles j and k are equal. the measure of angle h is 100 degrees. how do you determine the measure of angle j

Every triangle has a total of 180 degrees. If one angle measure is 100, then 180-100 is 80. This means that the other two angle measures have a total of 80. As angle j and k are equal, we divide 80 by 2, to get 40. This means that the measure of both angle j and k is 40 degrees. The measure of angle j is 40 degrees. 

17 is c. congruent means equal in size