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Answer:
A
Step-by-step explanation:
Using the sine ratio in the right triangle
sin40° = =
=
Multiply both sides by 10, then
10 × sin40° = AC → A
Factor out the leading coefficient:
Now complete the square:
Now, redistributing the leading
gives
Now complete the square:
Now, redistributing the leading
These lines look like the MEDIANS of each side of the triangle. A median bisects a side of the triangle (splits it exactly in half) into two equal halves. Where 3 medians of a triangle meet is termed the CENTROID of the triangle.
