Perform the calculation.
-$$90 ^ { \circ } - 34 ^ { \circ } 28 ^ { \prime } 50 ^ { \prime \prime }$$
A) $55 ^ { \circ } 31 ^ { \prime } 10 ^ { \prime \prime }$
B) $56 ^ { \circ } 32 ^ { \prime } 10 ^ { \prime \prime }$
C) $55 ^ { \circ } 31 ^ { \prime } 9 ^ { \prime \prime }$
D) $55 ^ { \circ } 32 ^ { \prime } 10 ^ { \prime \prime }$

Question

Quizplus · Accepted Answer

To subtract angles, start from the right: subtract seconds, then minutes, then degrees. If necessary, borrow from the next higher unit. Here, $90^\circ - 34^\circ 28' 50'' = 55^\circ 31' 10''$, because $90^\circ - 34^\circ = 56^\circ$, but you need to borrow for the minutes and seconds, resulting in $55^\circ 31' 10''$.

Perform the Calculation 90∘−34∘28′50′′90 ^ { \circ } - 34 ^ { \circ } 28 ^ { \prime } 50 ^ { \prime \prime }90∘−34∘28′50′′

Perform the Calculation $90 ^ { \circ } - 34 ^ { \circ } 28 ^ { \prime } 50 ^ { \prime \prime }$