Trigonometry And Unit Circle Worksheet Template Page 2
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8Part 1 – Unit Circle
The Special Right Triangles
If we make the hypotenuse 1:
1
3
1
1
2
1
2
2
2
30°
45°
60°
3
2
1
2
2
2
Next we’ll take one of those triangles and put it on a coordinate
plane:
A
1
x
y
What would the
- and
- coordinates of point A (formed by a
30°
30°
angle) be?
(Hint: Use the lengths of the sides of the triangle.)
(0,0)
Do the same for a 45° angle and a 60° angle:
If you look at the three points we have traced
out so far, they all lie on a circle centered at
C
the origin.
B
1
1
45°
60°
1
(0,0)
(0,0)
What is the radius of this circle?
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