## alainabbyboo22 Group Title can someone help me please ? If AD = 8 cm and AC = 24.5 cm, calculate the length of AB. A. 16 cm B. 15 cm C. 30.63 cm D. 14 cm one year ago one year ago

1. alainabbyboo22 Group Title

2. alainabbyboo22 Group Title

do you know this ?

3. jim_thompson5910 Group Title

4. waterineyes Group Title

Liked it..

5. alainabbyboo22 Group Title

i just still don't get this .

6. waterineyes Group Title

Theorem says : $tangent^2 = Secant \cdot Chord$

7. waterineyes Group Title

I.e : $AB^2 = AD \cdot AC$ Just plug in the values..

8. jim_thompson5910 Group Title

according to theorem 3 on that page b*c = a^2 In this context, if AB = x, AD = 8 and AC = 24.5, then (AD)*(AC) = (AB)^2 8*24.5 = x^2 Keep going to solve for x

9. alainabbyboo22 Group Title

38416 . that is what i got cause i did 8*24.5 which equals 196 , then 196^2 and that gives me 38416 .

10. jim_thompson5910 Group Title

you take the square root of 196

11. jim_thompson5910 Group Title

this will give you a smaller number (than 196)

12. alainabbyboo22 Group Title

14 !!

13. alainabbyboo22 Group Title

thanks for helping me out on this (: i was lost !

14. jim_thompson5910 Group Title

yw