Question

Can someone help me and give me the work plz

Answer 1

y = sqrt(9 * 16).

This formula is derived because of similar parts of similar right triangles.

It is called the geometric mean which you can google for right triangles that share a common side.

y = sqrt(144)

y = 12

D is the only possible answer.

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x = sqrt(9^2 + 12^2)

x = sqrt(81 + 144)

x = sqrt(225)

x = 15

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z = sqrt( (9 + 16)^2 - 15^2)

z = sqrt( 25^2 - 15^2)

z = sqrt(625 - 225)

z = sqrt(400)

z = 20

Answer D

z =