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Right Triangles and Trigonometry

Right Triangles and Trigonometry

At a Glance - Special Right Triangles

Right triangles are special by themselves, but there are two magical types of right triangles that we think deserve mentioning: 45-45-90 triangles and 30-60-90 triangles. No, those aren't their bust and waist measurements. We classify them based on their angles since angles are what determine similarity.

Example 1

Find the value of d.


Example 2

Find the value of x.


Example 3

Find the value of y.


Exercise 1

Find the values of x and y.


Exercise 2

Find the values of x and y.


Exercise 3

Find the values of x and y.


Exercise 4

Find the perimeter of the figure.


Exercise 5

Find the value of x.


Exercise 6

Find the perimeter of the largest triangle.


Exercise 7

What's the value of y in the figure below?


Exercise 8

ABC is a Gandalf (45-45-90) triangle with the 90° angle at A. Find the coordinates of A in quadrant I if given the following coordinates: B (-5, 1) and C (4, 10).


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