Practicing Success
ΔABC is an isosceles triangle with AB = AC = 13 cm. AD is the median on BC from A such that AD = 12 cm. The length of BC is equal to : |
5 cm 7.5 cm 10 cm 6 cm |
10 cm |
Given, AB = 13 AD = 12 then BC = ? So, according to the pythagoras theorem = H2 = B2 + P2 Here ABD is a right angled triangle So, according to the pythagoras theorem = 132 = BD2 + 122 BD2 = 169 - 144 BD2 = 25 BD = \(\sqrt {25}\) = 5 So the value of BC = 2 $\times$ 5 = 10 |