A quadrilateral has three acute angles each measure as 80° what is the measure of 4th angle?
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Answered by
5
Sum of all 4 angles = 360°
80° + 80° + 80° + x° = 360°
x = 120°
80° + 80° + 80° + x° = 360°
x = 120°
Answered by
6
Hello !
4 angles → 360°
Three angles → 80° × 3 = 240°
4th angle → 240° + x = 360°
x = 240° - 360° = 120°
4 angles → 360°
Three angles → 80° × 3 = 240°
4th angle → 240° + x = 360°
x = 240° - 360° = 120°
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