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zepelin [54]
3 years ago
10

(a) Draw in radii OA, OB, OC and OD. Then, explain why OAB must

Mathematics
1 answer:
lions [1.4K]3 years ago
7 0

Answer:

In the given circle, segments OA, OB, OC and OD are radius of the circle.

In other words, all those segments are congruent.

From that we can deduct that triangles OAB and OCD are isosceles triangles, because all segments are equal. That makes those triangles congruent, because they have the same sides.

From the congruence we can deduct that all corresponding internal angles inside those triangles are actually congruent, that's why angle OAB and ODC must be congruent.

Also, angles DOC and BOA are also congruent, which means their subtended arcs are also congruent, because they have the same radius, so mAB = mCD.

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s344n2d4d5 [400]
We have to find the slope of the line that passes through this points:
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