গাণিতিক যুক্তি MCQ
In the figure AC and BC are radii of circles. The length of AB is 8. If AC = 4, what is BC? (BC is tangent to the circle with center A.)
সঠিক উত্তর
4√3
Solution:Since BC is tangent to circle with centre A ∴ BC is perpendicular to AC.ΔABC is right angled triangle.So, BC = √(AB2 - AC2)= √(82 - 42) = √(64 - 16)= √48 = √(16 × 3)= 4√3