a, để mắt thấy ảnh của chân thi mep duoi guong cach mat dat 1 doan la IK.

Xét tam giác BB1O co IK la duong trung binh

nen : IK = BO/2

Nên IK = (1.65-0.15)/2

IK = 1.5/2=0.755/2=0.75m

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

- “Would you bother if I had a look at your paper?” - “……………”

A. You’re welcome

B. Well, actually I’d rather you didn’t

C. That’s a good idea

D. Oh, I didn’t realize that