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sin 0
opposite leg / hypotenuse
cos 0
adjacent leg / hypotenuse
tan 0
opposite leg / adjacent leg

What’s this called?
Hypotenuse

What’s this called?
Opposite Leg

What’s this called?
Adjacent Leg
X / 360 = arc length / circumference. What’s x?
Central Angle
Central Angle / x = arc length / circumference. Find x
360
Central Angle / 360 = x / circumference. What’s x?
Arc Length
Central Angle / 360 = arc length / x What’s x?
Circumference
x / pi = degree measure / 180, What’s x?
radian measure
radian measure / x = degree measure / 180, What’s x?
Pi
radian measure / pi = x / 180, What’s x?
Degree measure
radian measure / pi = degree measure / x
180