In a figure, triangle ABC is right-angled at B. Given that AB = 9 cm, AC = 15 cm and D, E are the mid points of the sides AB and AC respectively, calculate the area of ΔADE
A
13.5 cm2
B
12.5 cm2
C
23.5 cm2
D
none of the above
Medium
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Solution
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Correct option is A)
Given that AB=9cm,AC=15cm
BC=AC2−AB2
BC=152−92
BC=12cm
DE = 2BC=212=6cm D is the mid point of the side AB