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

what are the options? ?

step-by-step explanation:

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: