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A plane figure with three straight sides and three angles. We know that a triangle is a closed shape and has three sides and three vertices. The basic formula of the area of a triangle i.e., A = u00bdu00d7bu00d7h.<br>The formula of the area of a triangle applies to every type of triangle acute, right, scalene, isosceles, equilateral, and obtuse. We should remember that the base and the height of the triangle are perpendicular to each other.<br>
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