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Kruka [31]
3 years ago
13

30 points!!!

Mathematics
1 answer:
lara31 [8.8K]3 years ago
7 0

Answer:

SAS postulate

Step-by-step explanation:

AD (common)

AC = BD (both are diameters)

Angle COD = Ange AOD (vertically opposite angles)

Angle CAD = Angle BAD (angle on the circumference is half the angle at the centre)

Therefore, ABD and DCA are congruent by SAS postulate

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