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What is th area of a right angled traiangle ? A. The perimeter of the triangle is 30 cm. B. The ratio between the base and the height of the triangle is `5:12.` C. The area of the trangle is equal to the area of a reactangle of length 10 cms.A. Only B and C together are requiredB. Only A and B together are requiredC. Only either A or B and C together are required.D. Only A and C together are required |
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Answer» Correct Answer - B A Hypotenuse `=sqrt(5^(2)+12^(2))=sqrt(25+144)=sqrt(169)=13` Base: height: Hypotenuse `=5:12:13` B Base + Height + Hypotenuse = 30 cm `therefore"Base"=(5)/(5+12+13)xx30=5` cm height `=(12)/(5+12+13)xx30=12` cm Area `1/2basexx"height"=1/2xx5xx12=30cm^(2)` |
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