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Mathematics, 19.02.2021 22:10 shartiarahoward
A B and C are points on the circumference of a circle. XY is a tangent to the circle at the point A.
Angle BAY=72 and angle ABC=54.
Prove that triangle ABC is an isosceles triangle.
You must give a reason for any statement or any calculation you carry out.
( do not answer if you don't know the answer, thank you.)
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