Which triangle's unknown side length measures 7 units?

A

Step-by-step explanation:

Blue triangle

Step-by-step explanation:

x = unknown side

Use the Pythagorean Theorem

Blue triangle:

x² + 5² = √74²

x² + 25 = 74

x² = 74 - 25

x² = 49

x = √49

x₁ = 7,  yes

x₂ = - 7,  no

Pink triangle:

x² + √18² = 5²

x² + 18 = 25

x² = 25 - 18

x² = 7

x₁ = √7,  yes

x₂ = - √7,  no

Yellow triangle:

x² + √6² = √43²

x² + 6 = 43

x² = 43 - 6

x² = 37

x₁ = √37,  yes

x₂ = - √37,  no

Green triangle:

x² + √2² = 4²

x² + 2 = 16

x² = 16 - 2

x² = 14

x₁ = √14,  yes

x₂ = - √14,  no

add an image

step-by-step explanation:

these sign is used to tell weather the number is greater or less than the number   <   or >     but this sign means its equal =    

hope this you and

step-by-step explanation: