Graph the image of the given triangle, reflected across the y-axis. Select the Polygon tool. Then, click the points of the trian
gle vertices to create the triangle by connecting the sides Polygon * Move Undo Redo x Reset y 10 9 8 7 6 5 4 3 2 1 2 3 10-9 -9 -7 -6 -5 -4 -3 -2 -10 1 4 5 6 7 8 9 10
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Answer:
Step-by-step explanation:
In a right triangle, the two acute angles are complementary--they add up to 90 degrees.
Cosine is defined as the adjacent side divided by the hypotenuse. In the attached picture, .
The other acute angle is 90 - 18 = 72 degrees. Looking at just that angle, side <em>a</em> is the opposite side. So the ratio a/h is opposite over hypotenuse -- the sine ratio.
Therefor,