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10 cards from this deck
A triangle with one angle exactly 909090 degrees.
The longest side opposite the right angle.
The side next to the angle of interest, not hypotenuse.
The side opposite the angle of interest.
c2=a2+b2c^2 = a^2 + b^2c2=a2+b2, where ccc is hypotenuse.
sinθ=oppositehypotenuse\sin \theta = \frac{\text{opposite}}{\text{hypotenuse}}sinθ=hypotenuseopposite.
cosθ=adjacenthypotenuse\cos \theta = \frac{\text{adjacent}}{\text{hypotenuse}}cosθ=hypotenuseadjacent.
tanθ=oppositeadjacent\tan \theta = \frac{\text{opposite}}{\text{adjacent}}tanθ=adjacentopposite.
Area = 12×base×height\frac{1}{2} \times \text{base} \times \text{height}21×base×height.
Area = length×width\text{length} \times \text{width}length×width
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