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For the given right angled triangle, the base of the triangle is 10 units and perpendicular side is 9 units then its side length x is equal to 13.45 units (nearest hundredth).As given in the question,Given right angled triangle,Base of the triangle is equal to 10 unitsPerpendicular side of a triangle is equal to 9 unitsSide length 'x' is the hypotenuse of the right angled triangle.Using Pythagoras theorem we get,(Hypotenuse)² = ( Base)² + ( Perpendicular side)²⇒ x² = (10)² + (9)²⇒ x² = 100 + 81⇒ x² = 181⇒ x = √181⇒ x = 13.4536...⇒ x = 13.45 units ( nearest hundredth) Therefore, for the given right angled triangle, the base of the triangle is 10 units and perpendicular side is 9 units then its side length x is equal to 13.45 units (nearest hundredth).Learn more about right angled triangle herebrainly.com/question/3770177#SPJ1