Draw a horizontal line to signify the starting point. From this line draw an angle of 20 degrees from it.

From the end of the horizontal line draw a vertical line (so that a right-angle is formed with the horizontal) until it reaches the angle line.

You should now have a right-angled triangle to work with. We know that the hypotenuse is 500m and the angle is 20 degrees. To find the height label the vertical linehand note this opposite the 20degree angle.

We now have an angle and the hypotenuse while needing to find the opposite. Can you recall a trig ratio to use in this situation