Answer:
Competition in the Cold War
Explanation:
The Soviet became the second country to develop nuclear weapon after the United States. As both countries engaged in military weapon which led to the development of missile and rocket. The U.S. began to panic when the Soviet launch the first artificial satellite called Sputnik to go to space.
The successful launching of Sputnik I by the Soviet Union led to the direct formation of NASA in America. Government passed the National Aeronautics and Space Act in 1958. The Sputnik I was a technological success with its size, caught everyone attention, especially Americans who were astonished by Soviet technology.
Yuri Gagarin became the first to go to space. John Glenn became the first American to orbit the earth. Neil Armstrong became the first human to step on the moon.
tan A should be the corner try work out work out:

first and then add all the others (B=90)
Explanation:
A and C should be the same
No one really knows, but we were apparently created in his image so maybe like us? Hope this helps! =^-^=
Maybe..... the signing of the constitution???
The cross is a really meaningful symbol