Which choice correctly describes the blood that leaves the lungs? A. oxygen-poor
B. oxygen-rich
C. iron-rich
D. calcium-poor

B. oxygen-rich

Explanation:

Oxygenated blood leaves the lungs through pulmonary veins, completing the pulmonary cycle.

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(a) 1.75 + 1.25 = 3 inches.

Now the other side is 3.25 inches long, so a triangle can't be constructed.

For a triangle to be formed the length of any side must be less than the sum of the other 2 sides.

(b) if the length of the longest side is reduced to less than 3, say 2.5 inches then a triangle can be constructed.