Answer:
perimeter of the triangle EFG is 82 units
Step-by-step explanation:
1. we know that perimeter is all the lengths of the traingle added together.
2. we know two sides are 26 and 17 (that is given to us)
FG=26 and FE=17 (just like side BC)
3. Now we have to find the third side of the triangle. To do this we must first find X, by setting the GE=BD
4x-9=2x+15 (solve by isolating X)
x=12
4. now we plug X value of 12 back into one of the equations to find the total side length.
2(12)+15= 39
5. Now we have all the pieces and can find the perimeter.
39+26+17=82
82 units
