Question

1. If I know the lengths of two sides of a right triangle, how do I find the third?
2. Could I find the two missing side lengths of a right triangle if I only know one side length and one angle measure (other than the 90 degree angle)?
3. Could I find the two missing angle measures if I know some of the side lengths of a right triangle?
4. What makes a triangle a “special” right triangle? How can special right triangles help me find side lengths?
(Sorry to those who posted on my last question but the site mysteriously deleted it :[ )

Answer 1

Given angle A = 40 degrees and side c = 15, which is side AB

Then sin(A) = (opposite leg)/(hypotenuse)

Sin(40) = a/15... Multiply by 15

15(sin40)= a.... Plug in to the calculator

a= 9.6

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Then cos(A)= (adjacent leg)/(hypotenuse)

Cos(40) = b/15

15cos(40) = b

b= 11.5

Answer 2

which question would that be for ?

Answer 3

im lost