Question
If the area of a triangle is 1125 cm2 and
base: corresponding altitude is 2:5, then the altitude of the triangle is:Solution
Using the formula, Area of the triangle = 1/2 x base x height  Let the base and altitude be 2x and 5x respectively. According to question, ⇒ 1/2 x base × altitude = 1125 cm2 or, ⇒ 1/2 x (2x) x (5x) = 1125 ⇒ 10x2 = 2250 ⇒ x2 = 2250/10 ⇒ x2 = 225 ⇒ x = √225 ⇒ x = 15 cm Altitude of a triangle = 5x = 5 × 15 cm = 75 cm
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