Respuesta :
Answer:
The answer is; D.) 54
Step-by-step explanation:
Equilateral = Equal, so 54 = 54 = 54
Extra:
Please give brainlest!
Answer:
A:63°
Step-by-step explanation:
THE SUM OF ANGLES IN A TRIANGLE IS 180°
180°-54°=126°
126°÷2=63°
THE ANSWER IS A:63°