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How would i find the measurement of angle 1 & 2

How would i find the measurement of angle 1 & 2-example-1

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Check the picture below.

keeping in mind that a circle has a total of 360°, if the twin angles of 72° add up to 144°, what remains for the other twin angles is 360° - 144° = 216°, and that 216 is split between both twins for 108 a piece, taking away the 40° next to ∡2, gives us ∡2.

How would i find the measurement of angle 1 & 2-example-1
User Akshar Gupta
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