0Question:
Solution:
AD + AE = 25
AD = x
AE = 25-x
1/2(Area of triangle ABC) = Area of triangle ADE
1/2 ( 1/2× 16×18×SinA) = 1/2 *(25-x)x * SinA
=> x = 9 = AD
25-x = 16 = AE
9²+16²-DE²/(2×9×16) = 16²+18²-20²/(2× 16× 18)
337-DE² = 90
DE² = 247
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Question:
Solution:
AD + AE = 25
AD = x
AE = 25-x
1/2(Area of triangle ABC) = Area of triangle ADE
1/2 ( 1/2× 16×18×SinA) = 1/2 *(25-x)x * SinA
=> x = 9 = AD
25-x = 16 = AE
9²+16²-DE²/(2×9×16) = 16²+18²-20²/(2× 16× 18)
337-DE² = 90
DE² = 247
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