In fig 3.38 QRS is an equilateral triangle. Prove that,

(1)Given QRS is an equilateral triangle, sides are equal in measure.QR = RS = QSarc QR = arc RS = arc QS [Corresponding arcs of congruent chords of a circle are congruent]arc RS arc QS arc QR….(i)Hence proved.(2)m(arc RS)+ m(arc QS)+ m(arc QR) = 360˚ [Measure of a complete circle is 360°]Also from (i) arc […]