It is when either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days.

; to find the length of the hypotenuse, you have to use the pythagorean theorem, which states that, in a right triangle,

.

and

would be the two legs, while

would be the hypotenuse. You need to plug in the values of the legs as

and

:

. Solve for the squares of the two numbers, resulting in

, and ultimately

. Find the square root of

and

, and you get

.
Angle 5 is congruent to angle 2.
When 2 lines cross each other, the 2 angles across from each other will be congruent.