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# Special Right Triangles

0
30
2
+769

Each triangle is a 30-60-90 triangle, and the hypotenuse of one triangle is the longer leg of an adjacent triangle. The hypotenuse of the larger triangle is 16 centimeters. What is the number of centimeters in the length of the longer leg of the smaller triangle?

Thanks!

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#1
+12117
+1

Let's find the longer leg of the larger triangle first ...this is also the hypotenuse of the smaller triangle

cos 30 = sqrt3 / 2 = adj / hyp = adj/16

adj = 16 sqrt3 / 2   = 8 sqrt3   = hypotenuse of smaller triangle

now for the smaller triangle

cos 30 = adj / hyp  = sqrt 3  / 2  =  adj / (8 sqrt 3)

adj = longer leg =  sqrt 3 / 2  *  8 sqrt 3 =   12 cm

ElectricPavlov  Mar 3, 2018
#2
+769
0

Hey, thanks so much!

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