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12 questions from this quiz
Visualising and identifying triangles
Create a right-angled triangle
Draw a 2D sketch with marked lengths
Use trigonometry to find the angle
When you know 2 sides and angle between
a2+b2=c2a^2 + b^2 = c^2a2+b2=c2
a2=b2+c2−2bccosAa^2 = b^2 + c^2 - 2bc \cos Aa2=b2+c2−2bccosA
sinθ=oppositehypotenuse\sin \theta = \frac{\text{opposite}}{\text{hypotenuse}}sinθ=hypotenuseopposite
tanθ=oppositeadjacent\tan \theta = \frac{\text{opposite}}{\text{adjacent}}tanθ=adjacentopposite
d=l2+w2+h2d = \sqrt{l^2 + w^2 + h^2}d=l2+w2+h2
It uses the same fundamental rules
They have regular structure
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