ΔABC is an isosceles triangle with AB = AC = 13 cm. The length of altitude from A on BC is 5 cm. Find BC.
In △ABC sides AB= 13cm , AC=13cm
let M be a point on side BC
Such that BM = a ,MC = a
AMC is a right angle triangle at M...
By pythagoras theorem
BC = AM + MC = a + a = 12 + 12 = 24
BC = 24