Practice30Create account

The incircle of triangle ABC touches BC, CA and AB at D, E and F. If AF = 4 cm, BD = 6 cm and CE = 5 cm, what is the perimeter of the triangle?

Competition practiceGeometry
  • A30 cm
  • B15 cm
  • C25 cm
  • D36 cm

Step-by-Step Solution

Tangents from a vertex are equal: AE = AF = 4, BF = BD = 6, CD = CE = 5. The perimeter is cm.
Answer: A) 30 cm

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Geometry practice questions

More Geometry practice

Triangle ABC has AB = 8 cm, BC = 10 cm and CA = 12 cm. Its incircle touches AB at F.…A right-angled triangle has legs 8 cm and 15 cm. What is the radius of its incircle?A parallelogram is drawn so that a circle touches all four of its sides. One side of the…The centres of two circles of radii 7 cm and 5 cm are 20 cm apart. How long is a…Two circles of radii 9 cm and 4 cm touch each other externally. Find the length of their…