17-01-2020
Mathematics

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Im so confused pls help

Im so confused pls help class=

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keelanM keelanM

17-01-2020

Answer:

a = 49°

Explanation:

You use the rule ‘exterior angle of a triangle’ which states that the exterior angle is equal to the sum of the two opposite interior angles.

To put it mathematically:

a + a = a + 49° (Ext angles of triangle)
a = a - a + 49°
a = 49°

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