The cease-fire that ended the Vietnam War stated that Americans had to return Communist prisoners of war.
Communists had to withdraw their forces from South Vietnam.
O both parties had to respect South Vietnam's right to self-determination.
the United States could not add troops to its existing forces in South Vietnam.

both parties had to respect South Vietnam’s right to self-determination.

Explanation:

right on edge

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

not sure might be he acquired the entire oregon territory from great britain