Answer:
third one is not true means wrong
Theorem
The measure of an exterior angle of a triangle equals the sum of measures of the remote interior angles.
Angle STV is an exterior angle of triangle SRT.
The two remote interior angles to exterior angle STV are angles S and R.
Since the triangle is isosceles, with sides ST and TR equal, angles S and R are equal, so they both measure 27 deg.
<STV = 27 + 27
<STV = 54
If 3.14 is rational, why should pi also be rational ?
The answer to your question is: Because pi is not 3.14 .
The ratio of areas is the square of the scale factor, so that factor is
√(320/180) = 4/3
Round down to 10. 13 goes to 10.
