What does A represent in this photo?!?!?

Which was not a country that massively built up its navy in the early 1900s? germany china united statesbritain

Answer this asap. why did the americans go to china? a. trading b. exploration c. land d. live stock

Rectangle qrst is shown. angle qrt is congruent to angle str, and angle str is complementary to angle qtr. which statement is true about angles qrt and qtr? they are congruent. they are complementary. they are supplementary. they are right angle