Cho tam giác ABC có 3 góc nhọn và đường cao AH .Lây I đối xứng H qua AB, HI cắt AB tại M a)Chứng minh tam giác ABH= tam giác ABI
B) Lấy K đối xứng H qua AC . Chứng minh tam giác AKI cân
C) Chứng minh góc KAI = 2 góc BAC

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.