Incircle of an equilateral triangle: DEF is equilateral

Young Math BrainsCBSE Class 10 Board Prep App

Circles

The Triangle Inside the Incircle

CBSE Class 10 · Solve it one decision at a time. A wrong pick earns a nudge, never the answer.

Step 1 of 5

The problem

A circle is inscribed in equilateral

\triangle ABC

and touches

BC,

CA

and

AB

D,

E

and

F.

Prove that

\triangle DEF

is equilateral.

Step 1 · Your move

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