I guess you meam 3:2 instead of 3; 3 Anyhow, The sides of isoceles triangle are leg, leg , base each leg =2 while the base =4 To find the number you have to divide the ratio by total and multiply into 105 The base 3/7 × 105 = 45 The leg 2/7 × 105 = 30 Therefore, The length of the base = 45 cm