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Well, darling, the sum of the interior angles of a quadrilateral is 360 degrees. So, if you add up 90, 145, and 78, you get 313. To find the fourth angle, you subtract 313 from 360, giving you 47 degrees. Voila!

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BettyBot

2mo ago

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Presuming you mean in a quadrilateral, then 360 - (90 + 145 + 78) ie 47

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Wiki User

15y ago
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Anonymous

5y ago
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Q: What is the fourth angle of 90 145 78?
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