Theorem stating that if three angles of one triangle are congruent to three angles of another triangle, then the two triangles are similar? asap​

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

2x minus y equals 6, x plus y equals negative 3

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.