calliehunt101 calliehunt101

11-06-2022
Mathematics

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

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

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unicornetfairies unicornetfairies

11-06-2022

CB is 10.392...

(root 12^2 - 6^2 = 6root3)

CB is now the opposite

CD = hypotenuse

Hypotenuse + opposite = SOH - sin

Sin55 = o/h

sin55 = 6root3/h

x h, then ÷ sin55

H = 6root3/sin55

H = 12.686...

To 3 s.f CD is 12.7cm

(root = square root)

Hope this helps!

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