Question

Please help I don’t understand

Answer 1

Explanation:

so many isosceles triangles

y = 4 .. just by inspection.. we can see

SOH CAH TOA <= ask me about this if you don't get it

Cos(x) = Adj / Hyp

we don't know the Hyp this time so solve for that

Hyp = Adj / Cos(x)

Hyp = 4 / Cos(45)

Hyp = 4 /
`√(2)/2`

maybe you know.. but i'll just remind you to bring the fraction up from the denominator... invert and multiply

Hyp = 4 * 2/
`√(2)`

Hyp = 8/
`√(2)`

also we are supposed to write as a decimal rounded to the nearest 10th

Hyp = 5.66