ΔABC is an isosceles triangle and AB¯¯¯¯¯¯¯¯AB¯ = AC¯¯¯¯¯¯¯¯AC¯ = 2a unit, BC¯¯¯¯¯¯¯¯BC¯ = a unit. Draw AD¯¯¯¯¯¯¯¯AD¯ ⊥ BC¯¯¯¯¯¯¯¯BC¯ , and find the length of AD¯¯¯¯¯¯¯¯AD¯

• ক 15−−√2152 a unit ✅ সঠিক উত্তর
• খ 17−−√2172 a unit
• গ 15−−√15 a unit
• ঘ 17−−√17 a unit