Find X.
Round to the nearest tenth.
20 ft
22 ft
Х
18 ft
Y
X= [?]°

X = 70.5º

Step-by-step explanation:

Law of Cosines

c² = a² + b² - 2ab * cosC

22² = 18² + 20² - 2(18)(20) * cosX

484 = 724 - 720 *cosX

Subtract 724 from both sides

-240 = -720 * cosX

Divide both sides by -720

0.3333333333 = cosX

X = Arccos 0.3333333333

X = 70.52877936753502

Rounded

X = 70.5º

answer: the answer is one

step-by-step explanation:

pemdas, in this situation there is no parenthesis or exponents so you go to multiplication, 1x1=1, then division 1/1= 1 then addition 1+1=2 then subtraction 2-1=1

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

have a nice day!