In figure 3, below slope can also be expressed angle, as angle of slope horizontal distance [pigure 3 | determining the angle of sslope crater? show your work. (if you need 12. whot is the average angle of the western slope of the your lab manual.) review of basic trigonometry, see appendix a-s in 13. before the 1980 eruption, the summit of mt. st. helens was at an elevation of 2,950o meters (9,677 feet. a. using the geographic features icon (s j, record it below. determine the elevation of the current summit and s b. by approximately how much did the 1980 eruption reduce the height of mt. st. helens? (make sure you include the appropriate unit label on your answer.) 14 in which direction did the debris and pyroclastic flow from the 1980 eruption travel? what evidence supports this? 15. use the polygon tool to draw a polygon that is approximately the same dimensions as the mount st. helens crater. using the measurements tab on the polygon pop-up box, determine the perimeter and area of the crater in meters and square meters, respectively.