2024 AMC 8 Problems/Problem 24

Revision as of 17:08, 25 January 2024 by Whatdohumanitarianseat (talk | contribs) (Solution 1)

Problem

Jean has made a piece of stained glass art in the shape of two mountains, as shown in the figure below. One mountain peak is $8$ feet high while the other peak is $12$ feet high. Each peak forms a $90^\circ$ angle, and the straight sides form a $45^\circ$ angle with the ground. The artwork has an area of $183$ square feet. The sides of the mountain meet at an intersection point near the center of the artwork, $h$ feet above the ground. What is the value of $h?$

Solution 1

Extend the "inner part" of the mountain so that the image is two right triangles that overlap in a third right triangle. The side length of the largest right triangle is $12\sqrt{2},$ which means its area is $144.$ Similarly, the area of the second largest right triangle is $64,$ and the area of the overlap triangle is $h^2.$ Thus, \[144+64-\frac{h^2}{2}=183,\] which means that $\boxed{h=5\sqrt{2}}.$

~BS2012

~WhatdoHumanitariansEat fixed answer because BS2012 forgot to divide by 2