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16-01-2022
Mathematics

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AB = 6cm , AC = 12cm
Calculate the length of CD
Give your answer to 3 significant figures

AB 6cm AC 12cm Calculate the length of CD Give your answer to 3 significant figures class=

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unicornetfairies unicornetfairies

16-01-2022

Answer:

144-36=108

Square root 108 = 10.4cm (cb)

Soh Cah toa

Sin(55) =o/h

=10.4/h

xh

H x sin55 =10.4

÷sin55

H= 10.4/sin55

H=12.7cm

CD is 12.7cm to 3 s.f.

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