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Answer :

Reinhard10158go

Step-by-step explanation:

in this scenario you can imagine that there is a circle with a radius of 12.4 and it's center in the bottom left corner of the triangle.

for that 70 degree angle in that corner x is cos(70)×12.4, and the height of the triangle is sin(70)×12.4

so,

cos(70) = x/12.4

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