The sum of two numbers is 10, if one number is subtracted from the other, the result is -2. find the numbers

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

The trigonometric ratios sine and secant are reciprocals of each other

Are the corresponding angles congruent? explain why or why not.