Multiple choice

Two unequal circles X and Y touch each other externally at point C. The circles have a direct common tangent AB, where A and B are respective points on X and Y where the tangent touches them. If A and C is joined and extended such that it intersects Y at D and, B and C is joined and extended such that it intersects X at E and ∠EAD + ∠DBE = 216°, then find the measure of ∠AEB + ∠BDA.

  1. 75°

  2. 60°

  3. 48°

  4. 36°

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the geometry of two circles touching externally with a common tangent, the angles formed by the intersection of lines through the point of contact follow specific properties. Based on the cyclic properties and the given sum, the result is 48 degrees.