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# Special Right Triangles - PowerPoint PPT Presentation

Special Right Triangles. Definition. Special Right Triangles – right triangles whose angle measures are 45 °-45°-90° or 30°-60°-90°. Get out a dollar bill if you have one!. What kind of triangle is this?

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## PowerPoint Slideshow about ' Special Right Triangles' - orlando-farrell

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### Special Right Triangles

• Special Right Triangles – right triangles whose angle measures are 45°-45°-90° or 30°-60°-90°.

What kind of triangle is this?

If you split this triangle down the middle (top to bottom) what two triangles would you have?

• How do I find the side lengths of a 30-60-90 special right triangle?

• How do I find the side lengths of a 45-45-90 special right triangle?

30°-60°-90° Triangle Theorem

Find all side lengths for each triangle. Please draw the triangles on your paper.

1.

60º

18

3.

30º

30º

12

60º

2.

60º

20

30º

Warm-Up (will be collected) triangles on your paper.

1.

60º

26

2.

30º

30º

83

3.

60º

30º

9

60º

45 triangles on your paper. °-45°-90° Triangle Theorem

Example 1 triangles on your paper.

• Find the value of x.

You Try! triangles on your paper.

• Find the value of x.

Example 2 triangles on your paper.

• Find the value of x.

You Try! triangles on your paper.

• Find the value of x.

Example 3 triangles on your paper.

• Find the values of s and t.

You Try! triangles on your paper.

• Find the values of f and g.