ACT Preparation / Unit 13 ACT 1226 short lesson, about 20 seconds
The 30-60-90 Triangle
Captions available
The idea
In a 30-60-90 triangle, the hypotenuse is twice the shorter leg, which faces the 30° angle, and the longer leg is the shorter leg times √3.
In practice
Shorter leg 4: hypotenuse 8, longer leg 4√3. Hypotenuse 10: shorter leg 5, longer leg 5√3.
Where people slip
Find the shorter leg first; every other side follows from it.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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