Trigonometry-3 In Greek this just means: Working with Triangles
Trigonometry Working with Greek letters to show angles in right angled triangles. Exercises
We often use Greek letters for angles. One of the letters is called theta. It is written as θ. Using Greek Letters for Angles θ θ stands for the size of the angle, e.g. 30°.
One letter is: θ, called theta Another letter is: β, called beta. Another letter is: α, called alpha. Other Greek Letters for Angles These letters are all sometimes used in trigonometry.
The hypotenuse is always the side opposite the right angle. The Hypotenuse θ Hypotenuse
Move your finger onto angle θ. The Opposite Side of θ θ Move your finger down the middle of the triangle. The side you get to is the opposite side.
The Opposite Side of θ θ Opposite
The adjacent side starts from the angle you are working with and goes to the right angle. Adjacent Side θ
Now you know how to find the hypotenuse, opposite and adjacent sides of a right angled triangle. Adjacent Side Hypotenuse Opposite Adjacent θ
You are working with angle θ. Which side is the hypotenuse? Label the Sides a b c θ a b c
Hypotenuse a b c Well Done! θ a b c
You are working with angle θ. Which side is the opposite side? Label the Sides a b c θ a b c
a b c Well Done! Opposite θ a b c
You are working with angle θ. Which side is the adjacent side? Label the Sides a b c θ a b c
a b c Well Done! θ a b c Adjacent Hypotenuse Opposite
You are working with angle θ. Which side is the hypotenuse? Label the Sides a b c a b c θ
Hypotenuse a b c Well Done! a b c θ
You are working with angle θ. Which side is the opposite side? Label the Sides a b c a b c θ
a b c Well Done! Opposite a b c θ
You are working with angle θ. Which side is the adjacent side? Label the Sides a b c a b c θ
a b c Well Done! a b c θ Adjacent Hypotenuse Opposite
Now you know how to label the sides of a right angled triangle. Label the Sides Hypotenuse a b c Opposite Adjacent a b c θ
Well Done!
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