We have the following:
We can solve the triangles by means of the trigonometric ratios, which relate the hypotenuse with the legs.
The main trigonometric ratios are:

1.
To calculate the first triangle we must use the trigonometric cosine ratio, which relates the hypotenuse with the adjacent leg:

2.
To calculate the first triangle we must use the trigonometric ratio sine, which relates the hypotenuse with the opposite leg

3.
To calculate the first triangle we must use the tangent trigonometric ratio, which relates the adjacent leg with the opposite leg
