Respuesta :
Complementary angles are 2 angles whose sum is 90 degrees
∠A+∠B=90°
∠B=64°
64+∠A=90
subtract 64 from both sides
∠A=26°
∠A+∠B=90°
∠B=64°
64+∠A=90
subtract 64 from both sides
∠A=26°