Ineed you write the standard numeral for 8 thousands 4 hundreds 6 tens 19 ones

The sum of the measures of the triangles are known to be always equal to 180 degrees. In this item, we are given that angle J is equal to 72 degrees, angle K is equal to 36 degrees. If we let mK be the measure of the angle then, we can express the sum as,
     
180 = 72 + 36 + mK

The value of mK from the equation is 72 degrees. Since this is equal to J then, it is also a base angle. 

Then, the answer to the question is the second choice.