tick number 1 and 5. because if 30%=120 , therefore 100%= 100/30*120=400
See Explanation
Step-by-step explanation:
1. By interior angle sum Postulate of a triangle.
From equations (1) & (2), we find:
Hence proved
2. In
is exterior angle.
Therefore, by remote interior angle theorem, we have:
From equations (1) & (2), we find:
is an isosceles triangle.
Thus proved.