Question

αnswєr wíth prσpєr єхplαnαtíσn
αnd wíth prσpєr mєthσd​

Answer 1

Answer:

4/5 of 90° = 4/5x90 = 72°

Sum of supplementary angles = 180°

therefore, supplementary angle of 72° = 180-72 = 108°

Answer 2

$\huge\colorbox{grey}{Answer ✔}$

$supplement \: of \: \frac{4}{5} \times 90 \: degree \\ = 72 \: degree$

Hope it helps ☺️☘️