Engineering Board Exam Reviewer · Radius of Inscribed Circle · easy
ECE Board November 1998: If an equilateral triangle is circumscribed about a circle of radius 10 cm, determine the side of the triangle.
- 34.64 cm
- 64.12 cm
- 36.44 cm
- 32.10 cm
Answer
A. 34.64 cm
Solution
For an equilateral triangle with inscribed circle radius r: r=s/2 3, so s=2 3,r=2 3(10) 34.64 cm.