In a right triangle, the ratio of an acute angle to a right angle is 2:5. What is the degree ratio of this acute angle to another acute angle?

In a right triangle, the ratio of an acute angle to a right angle is 2:5. What is the degree ratio of this acute angle to another acute angle?


x/90=2/5
x=36
y=90-36=54
36/54=2/3



The distance from Zengmu sand in the southernmost part of China's territory to Mohe in the northernmost part is 5500km, 63 points less than the total length of the great wall of China
It's a practical problem


5500x (1 + 63 / 8) = 6300 (km)