Line c is parallel to d. line f is parallel to g. line f is perpendicular to c. all lines are in the same plane. what other line must line f be perpendicular to?

You can solve this problem by looking at the slopes: lines c and d will have the same slope , because they are parallel. Similarly, lines f and g will have the same slope , because they are parallel.

Now, if f and c are perpendicular, is means that

So, the complete scenario is the following:

answer: 180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.