Nathan is standing in a meadow, exactly 185 feet from the base of El Capitan. At 11:00 a. m., he observes Emily climbing up the wall, and determines that his angel of sight up to Emily is about 10°. If Nathan’s eyes are about 6 feet above the ground, about how high is Emily at 11:00 a. m.?

they would have to work 32 hours.

the answer is:

the lateral area is equal to

to find the lateral area of the square pyramid, first we need to find the perimeter of the base, and then, find the lateral area using the following formulas:

where,

s, is the base length

slant height, is the height of a the side of the pyramid

we are given:

now, calculating the perimeter of the base, we have:

then, calculating the lateral area:

hence, we have that the lateral area is equal to

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