perimeter segi tiga di atas ialah P cm
 
											 
											Answer:
6e + 2f + 7
Step-by-step explanation:
The perimeter is the sum of the 3 sides of the triangle.
Note that the base and left side are congruent, thus
perimeter = 3e + f + 3e + f + 7 = 6e + 2f + 7