7,215: 34 = 0,212205882352941
Answer:
number 3
Step-by-step explanation:
thats my calcue
Given that triangle ABC is right angle triangle. CD is altitude such that AD=BC
ABC is a right angle triangle so apply Pythogorean theorem

(Given that AD = BC)
(Given that AB=3)
...(i)
ADC is a right angle triangle so apply Pythogorean theorem



...(ii)
Plug value (ii) into (i)





Hence final answer is 
Answer:
B
Step-by-step explanation: