Let the altitude from vertext R meet ST at point P.

Angle RSP 180 - Angle RST = 180 - 142= 38 degrees

Sin (Angle RSP) = PR/RS

Sin 38 = PR/RS,

we know RS = 10

Therefore, PR = 10 sin 38 = 10(0.61566)=6.1566

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As I was playing football with acquantinces, I realized that the ball I was playing with, was in fact a spherical shape. I delved further into this discovery and realized that it was a 360 degree shape. I took this one step furhter and realized that the same concept applied to all shapes and that the sum of all angles in a triangle is 180 degrees. So back to your problem:

180/3 and R is 142 that means that the sum of ST is 180-142.

So S is the square root of the altitude of the vertex of the squared root of the sum.

Evident as it now may be, I will spell it out to you. The answer is 16.

Yours sincerely,

Professor Adam Eugene Cornvy III. At the University of Oxbridge.

please help

greatly appreciated!!!