zulqurnain zulqurnain

02-04-2017
Mathematics

contestada

ABC IS a right angled triangle at B and D is a point on BC. If AD=18cm , BD=9cm and CD = 4 cm, find AC

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ElenaClairmont ElenaClairmont

02-04-2017

[tex]AB = \sqrt{ AD^{2} - BD^{2} } = \sqrt{243} = 9 \sqrt{3} [/tex]
[tex]AC = \sqrt{ AB^{2} + BC^{2} } = \sqrt{412} = 2 \sqrt{103} [/tex]

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