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Question 3 (b) · 5 marks

Circle geometry

Paper

TA is a tangent at A. Angle TAB = 62°, angle ABC = 48°. Determine, with reasons, the size of angle BAC.

angle ACB = angle TAB = 62°

Tan-chord: the angle between a tangent and a chord equals the angle in the alternate segment.

angle BAC + 48° + 62° = 180°

Angles in triangle ABC add up to 180°.

Next: solve for the angle asked for

Write your line first, then see how it is set out and why.

How it works

1
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2
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3
Try each line first
Write your line, then show the worked line and the reason for it.

Worked from your study material
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Every part on its own
Parts like 3(b)(ii) become questions of their own, each with its marks.

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No. You write each line yourself, then compare it with the worked line.

Can it read a scanned paper?

Not yet. The paper needs text you can select and copy. A paper that's only images is refused with a message saying so.

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One module is free. No card required.