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→Diagnosis: Cutoff
File:Talonavicular coverage angle.jpg|Dorsoplantar [[projectional radiograph]] of the foot showing the measurement of the talonavicular coverage angle.
File:Calcaneal pitch.jpg|Weight-bearing lateral [[Projectional radiography|X-ray]] showing the measurement of [[calcaneal pitch]], which is an angle of the [[calcaneus]] and the inferior aspect of the foot, with different sources giving different reference points.<ref name="pitch" group="note"/> A calcaneal pitch of less than 17° or 18° indicates flat feet.<ref name="uw-planus" />
File:Talar-1st metatarsal angle (Meary's angle).jpg|Same lateral X-ray showing the measurement of Meary's angle, which is the angle between the long axis of the [[Talus bone|talus]] and [[first metatarsal bone]].<ref name="uw-planus" /> An angle greater than 4° convex downward is considered a flat foot.<ref name="uw-planus" />
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