Please answer my question​

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

What is the area of the triangle 10 13 12