Question

if side AD= 18.02 cm and side AB=20 cm, calculate the length of side AC.

A. 16.4 cm
B. 15.5 cm
C. 20 cm
D. 22.2 cm

hangon a sec I gota draw it:)

Answer 1

@jennychan12

Answer 2

ohmigosh. i'm sorry. i suck at this, and i hated geometry. so sorry, no can do.

Answer 3

do u know someone who can?

Answer 4

sorry, no. :(

Answer 5

@Luis_Rivera please please help!!?

Answer 6

maybe this will help?
http://www.mathwarehouse.com/geometry/circle/

Answer 7

@phi

Answer 8

ok so i THINK it's AB^2 = AD(CD+AD)
judging by the link i gave u.

Answer 9

did it help? @katlin95 ? did u get ur answer?: if so, good :)

Answer 10

I dont know the number to put it for AB^2=AD(CD+AD) what did u get?

Answer 11

you said
I dont know the number to put it for AB^2=AD(CD+AD)
side AD= 18.02 cm and side AB=20 cm,

you should learn the idea of replacing a letter (or name) with its number.
they tell you AB=20. everywhere you see AB, replace it with 20 in the formula
also, replace AD with 18.02

in
AB^2=AD(CD+AD)

it really is worth understanding this idea: replace letters with numbers...
20^2 = 18.02*(CD + 18.02)
I would now solve for CD (CD is a length you are looking for, so you can add it to AD and so get AC)

if we call CD x you get this equation
20*20= 18.02*(x + 18.02)

solve for x: multiply 18.02 times each term in side the parens. as the first step....