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# Need your help please

So i have this quiz today and Iâve got an example for it so this is what the questions that will come Q/ Write a program to check whether a triangle is valid or not, when the three angles of the triangle are entered by the user. A triangle is valid if the sum of all the three angles is equal to 180 degrees. Q/Write a program in C++ using function to calculate the volume of the sphere. (Volume of sphere= , Note type of r should be float type).

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what

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Abdullah ibra 4 times the inverse tangent of 1 is pi.