(Данный ответ пишу на английском языке)
Answer:
(see explanation)
Explanation:
As the figure we deal with is parallelogram, it is obvious we can use a formula , where , and according to our task. Then the answer will be .
Solved!
(Данный ответ пишу на английском языке)
Answer:
(see explanation)
Explanation:
As the figure we deal with is parallelogram, it is obvious we can use a formula
, where 
, 
and 
according to our task. Then the answer will be 
.
Solved!