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# help

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how do i work out the length of the adjacent if i know the hypotenuse and the other one i forgot

Guest Jul 4, 2017

#1
+4777
+2

If you know the  length of the hypotenuse  and the  length of a leg  ,

you can use the Pythagorean theorem:

(leg)2 + (other leg)2  =  (hypotenuse)2

If you know the  length of the hypotenuse  and the  measure of an angle  (other than the 90º angle) ,

you can find the length of the leg adjacent to that angle using this:

cos (angle)  =  (length of side adjacent to the angle) / (hypotenuse)

hectictar  Jul 4, 2017
Sort:

#1
+4777
+2

If you know the  length of the hypotenuse  and the  length of a leg  ,

you can use the Pythagorean theorem:

(leg)2 + (other leg)2  =  (hypotenuse)2

If you know the  length of the hypotenuse  and the  measure of an angle  (other than the 90º angle) ,

you can find the length of the leg adjacent to that angle using this:

cos (angle)  =  (length of side adjacent to the angle) / (hypotenuse)

hectictar  Jul 4, 2017

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