Question

triangle abc is an isosceles triangle with AB equal to AC equal to 13 cm the length of altitude from a on BC is 5 cm find BC

Answer 1

24 cm
the altitude, the side AC and half the side BC form a right angled triangle
Let x be the length of half of side BC
${x}^{2} + {5}^{2} = {13}^{2} \\ therefore \: {x}^{2} = {13}^{2} - {5}^{2} \\ {x}^{2} = 169 - 25 = 144 \: which \: is \: the \: square \: of \: 12 \\ x = 12$
Therefore BC= 2x
So BC=24cm

Answer 2

Answer:

What does that mean??.........