CK12 - Geometry

To find , you can subtractthe measureof from.

So, the measureof is since and are complementary.

Tangentsof SpecialRightTriangles

It may help you to learnsomeof the mostcommonvaluesfor tangentratios.The tablebelowshowsyou
valuesfor anglesin specialright triangles.

Tangent

Noticethat you can derivetheseratiosfrom the specialright triangle.You can use these
ratiosto identifyanglesin a triangle.Work backwardsfrom the ratio.If the ratio equalsone of thesevalues,
you can identifythe measurementof the angle.

Example 4

Whatis in the trianglebelow?

Find the tangentof and compareit to the valuesin the tableabove.