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10 questions from this quiz
It is a right angle
Thales' theorem
90∘90^\circ90∘
OA=OB=OC=rOA = OB = OC = rOA=OB=OC=r
2×∠ACB=180∘2 \times \angle ACB = 180^\circ2×∠ACB=180∘
A right triangle
100100100
AC2+BC2=AB2AC^2 + BC^2 = AB^2AC2+BC2=AB2
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