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lukranit [14]
4 years ago
12

in quadrilateral abcd , angle A=57 degrees , angle B=65 degrees and angle c=118 degrees What is the measure of an exterior angle

at D
Mathematics
2 answers:
OlgaM077 [116]4 years ago
8 0
The total measure of the interior angles of a quadrilateral is 360 degrees
you are given 57, 65, 118
That is 240
to solve for the last angle
360-240
120
The exterior angle of a D would be the number that you add that will make it 180 degrees.
meaning 180-120 is 
The exterior angle of angle D is 60 degrees.

Hope this helps
Ivanshal [37]4 years ago
5 0

Answer:

60 degrees

Step-by-step explanation:

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