Cho (O;R)và đường thẳng d không có điểm chung với (O) sao cho khoảng cách từO đến d không quá 2R. Qua điểm M bất kì trên d, vẽcác tiếp tuyến MA, MB đến (O) (A, B là các tiếp điểm). Gọi H là hình chiếu vuông góc của O trên d. Vẽdây AB cắt OH ởK và cắt OM tại I. Tia Om cắt (O) tại E a)Chứng minh OM vuông góc với AB và OI. OM = R2

b)Chứng minh OK. OH = OI. OM

c)Tìm vịtrí của M trên d đểOAEB là hình tho

id)Khi M di chuyển trên d, chứng minh đường thẳng AB luôn đi qua một điểm cố định

Imade a fort for my pet gorilla by connecting two boxes. the first box is 555 meters long, 999 meters wide, and 999 meters high. the second box is 333 meters long, 888 meters wide, and 222 meters high.how many cubic meters of space does my gorilla have to play in her fort?

Part one: measurements 1. measure your own height and arm span (from finger-tip to finger-tip) in inches. you will likely need some from a parent, guardian, or sibling to get accurate measurements. record your measurements on the "data record" document. use the "data record" to you complete part two of this project. name relationship to student x height in inches y arm span in inches archie dad 72 72 ginelle mom 65 66 sarah sister 64 65 meleah sister 66 3/4 67 rachel sister 53 1/2 53 emily auntie 66 1/2 66 hannah myself 66 1/2 69 part two: representation of data with plots 1. using graphing software of your choice, create a scatter plot of your data. predict the line of best fit, and sketch it on your graph. part three: the line of best fit include your scatter plot and the answers to the following questions in your word processing document 1. 1. which variable did you plot on the x-axis, and which variable did you plot on the y-axis? explain why you assigned the variables in that way. 2. write the equation of the line of best fit using the slope-intercept formula $y = mx + b$. show all your work, including the points used to determine the slope and how the equation was determined. 3. what does the slope of the line represent within the context of your graph? what does the y-intercept represent? 5. use the line of best fit to you to describe the data correlation.

1. the wheeling bridge in west virginia is about 307 meters long. if you walk with a stride of about meter, about how many steps would it take you to cross this suspension bridge?