Type the correct answer in the box Round your answer to the nearest integer. You are standing at a certain distance from a building that is 20 meters tall. The angle of elevation that the top of the building makes with you feet is 45 degrees you walk meters toward the buildingthe angle of elevation changes to

55 degrees

Step-by-step explanation:

In the initial position, the angle of elevation of the 20 meter building to your feet is 45 degrees, that means that you are at 20 meters from the building (thus forming an isosceles triangle with with the building, with internal angles 456  degrees, 90 degrees, and 45 degrees.

When you walk 6 meters towards the building, you are now at 14 meters from it. Therefore you need to examine now another triangle where the angle is unknown but for which you know the opposite side (20 meters of the building's height), and the adjacent side (14 meters of your distance to the building). See image attached for more clarity on the picture you need to study.

The tangent of this new angle is defined as opposite side divided by adjacent (opp/adj) which in our case renders 20/14 = 10/7

So to find the angle, we need to apply the arctangent function to this value.

Therefore:

new angle = arctan(10/7) = 55 degrees

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.