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USPshnik [31]
3 years ago
10

What is the measure of a

Mathematics
1 answer:
pav-90 [236]3 years ago
7 0
I guess you want the measure of angle <CAB.

The angle ABD is flat thus its amplitude is 180 degrees. Because
<ABD = <ABC + <CBD you get
<ABC = <ABD - <CBD = 180° - 122° = 58°.

In a triangle, the sum of the amplitudes of the angles is 180°. Thus
<CAB + <ABC + <ACB = 180°. You get
<CAB = 180° - <ABC - <ACB = 47°.
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