Question

A quadrilateral has 2 angles that measure 75 degrees each, and one angle measures 150 degrees. What is the measurement of the 4th angle?

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Answer 1

60 degrees

Explanation:

A quadrilateral is a four-sided polygon, meaning that all four interior angles have to add up to 360 degrees. You already know that the other three angles add up to 300, so the last angle has to be 60 degrees.

Answer 2

x = 60

Explanation:

The sum of the angles of a quadrilateral are 360

75+75+150+x =360

Combine like terms

300 +x = 360

Subtract 300 from each side

300+x-300= 360-300

x = 60