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	r + r1 + r2 - r3 = 4R Cos C @EAG (Elite Academy Guntur) View
	r + r2 + r3 - r1 = 4R Cos A @EAG (Elite Academy Guntur) View
	r + r1 + r3 - r2 = 4R Cos B @EAG (Elite Academy Guntur) View
	Show that r+r3+r1-r2=4RCosB \|\|properties of Triangles\|\| (Maths Tutorials Telugu•1.1M) View
	r1 + r2 + r3 - r = 4R @EAG (Elite Academy Guntur) View
	show that r+r1+r2-r3=4RCosC \|\| 7marks properties of Triangles\|\| (Maths Tutorials Telugu•1.1M) View
	Properties of Triangles// Trignometry (Samarla Himabindu) View
	Properties of Triangles - Examples 13 (Jatheen's Math Channel) View
	kp sir properties of triangles introduction and problem to find r, r1, r2, r3, R (mee kp sir) View
	kp sir properties of triangles - Prove that 4(r1 r2 + r2 r3 + r3 r1) = (a+b+c)² (mee kp sir) View