Question

Plzzz solve this problem..

Answer 1

area of triangle OAB= 1/2. 4.AB
AREA OF OAC= 1/2. 6 . AC
AREA OF OBC= 1/2 . 10 .BC

AB= BC = AC

AREA OAB= 2AB
AREA OAC= 3AB
AREA OBC= 5AB
TOTAL AREA= 10 AB

AS EQUILATERAL TRIANGLE AREA IS √3/4 . AB^2
= 10 AB = √3/4 . AB^2
40/√3= AB