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A quadrilateral has three angles measuring 60 º , 45 º, and 100 º . What is the measure of the fourth angle?

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Answer:

155°

Explanation:

The sum four angles is 360° so:

60°+45°+100°+x=360°

x = 360°-100°-45°-60°=155°

User Mateusz Mrozewski
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