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BC is right angled atA(Fig 11.25). AD is perpendicular to Bte 13 om and AC- 12 cm. Find the area of AABC. Also f |
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Answer» ∆ABC is right - angled at A. so, BC is definitely hypotenuse.let AB is base and AC is altitude of ∆ABC.given, AB = 5cm , BC = 13cm and AC = 12cm now, area of triangle ∆ABC = 1/2 × base × altitude = 1/2 × length of AB × length of AC = 1/2 × 5cm × 12cm = 30 cm² hence, area of ∆ABC = 30cm² area of ∆ABC = 1/2 × length of AB × length of AC = 1/2 × length of BC × length of AD=> 5cm × 12cm = 13cm × length of AD => 60/13 = length of AD hence, length of AD = 60/13 cm |
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