For each triangle, find the missing side length to the nearest tenth. :
the hypotenuse is 20 mm long. how long is the side adjacent to a 15 degrees angle.

We can use trigonometry.  The cosine of 15 will be the side adjacent to the 15-degree side (the one we are looking for) divided by 20, the hypotenuse.  As cos(15) is about .966, we get 19.32 as the side we are looking for.

Number 5 is 50 degreesnumber 6 is 45 degreesnumber 7 is 60 degreesnumber 8 is 45 degrees