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प्रश्न
Most of the sailboats have two sails, the jib and the mainsail. Assume that the sails are triangles. Find the total area sail of the sailboats to the nearest tenth.
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उत्तर
In sailboat,
Area of a triangle = `1/2` × Base × Height
In ΔABC, ∠B = 90°, base (BC) = 10.9 m and height (AB) = 19.5 m
Area of ΔABC = `1/2 xx 10.9 xx 19.5`
= `212.55/2`
= 106.275 m2
In another triangular part,
Area of ΔDEF = `1/2 xx DF xx EH`
= `1/2 xx 23.9 xx 8.6`
= `205.54/2`
= 102.77 m2
Area of sailboat = 106.275 + 102.77 = 209.045 m2
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