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A ABC is right angled at A (Fig11.95) Ad is perpendicular to Bc. If A B = 5cm, BC=13cm andAC=12cm, find the area of a ABC. Also findthe length of AD.A12 cmw9B13 cmFig 11.25please help me to solve this problem |
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Answer» :Area = 30cm^2AD= 4.61 cm Explanation :As ABC is a RIGHT angled triangle, we can consider AC as HEIGHT and AB as BASE. Area of triangle ABC = 1/2(bh) = 1/2(5x12)= 30cm^2To FIND AC:if we consider BC as base, AD would be height. Area of triangle ABC = 30 cm^2 = 1/2(ADxBC)(13xAD)/2 = 30AD= 60/13 = 4.61 cm |
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