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Given: ABC is a right triangle with right angle C. AC = 15 centimeters and m<A = 40°.

What is BC, to the nearest tenth?

User AntonyMN
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1 Answer

4 votes


S(O)/(H)C(A)/(H)T(O)/(A) or
Sin(Opposite)/(Hypotenuse)Cos(Adjacent)/(Hypotenuse)Tan(Opposite)/(Adjacent)


The hypotenuse is the longest side of the triangle.

The opposite side is the side across from a point/angle.

The adjacent side is the side next to the point/angle.


To find BC, you can do this:


tan 40° = O / A

tan 40° =
(BC)/(15) Multiply 15 on both sides

15(tan 40°) = BC

12.6 = BC


BC = 12.6 cm


Given: ABC is a right triangle with right angle C. AC = 15 centimeters and m<A-example-1
User Lavel
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