Add: (-6c^5 – 3c – 4) + (5c^5 + 2c – 4). a -2c^5 – c + 5 b-c^5 – c – 8 c-c^5 – ^5c – 8 d-4c^5 – 7c – 4

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf