A wave that reflects off a fixed boundary, will have: (Check all that apply) -the opposite orientation
-the same frequency
-the same amplitude
-the same orientation

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

i think it might be a but you might want a second opinion

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true

i’ll just s take the points thxs