Question

in fig triangle QRS is an equilateral triangle .prove that
1 arcRS congrunt arc QS congrunt arc QR
2 m(arc QRS)=240​

Answer 1

Answer: Let O be, the center of the circle join O to R,Q,S

then

∠ROS=∠ROQ=∠SOQ=120

∘

As it is equilateral triangle so arc are equal and m(arcQRS)=120+120=240

solution

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