Formula for perimeter a+b+a+b
12+5+12+5= 17+17= 34 .34=P
Answer:
One triangle
Step-by-step explanation:
-The triangle's dimensions are defined and fixed.
-Given the fixed dimensions, only one unique triangle can be constructed.
-Hence, only one triangle of the dimensions 7.2cm, 6.9cm and 12.8 cm can be formed.
It costs 0.06 cents each minute.
Explanation : $15/250 minutes = $0.06