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alina1380 [7]
4 years ago
14

I need help with this please ASAP!!!!

Mathematics
2 answers:
vfiekz [6]4 years ago
5 0

Answer: Part 1, 360

Part 2, (x + 300 = 360)

Part 3, x = 60°

Step-by-step explanation: First things first, the figure given in the question is a quadrilateral (four sided figure). The sum of the interior angles of a quadrilateral equals 360°.

So, if three angles have been given and one angle is yet unknown, to calculate the unknown angle we simply write out the expression

Sum of interior angles = 360

x + 91 + 120 + 89 = 360

x + 300 = 360

Subtract 300 from both sides of the equation

x = 60.

Therefore, the fourth angle x measures 60°

Luda [366]4 years ago
4 0
X=60 you need to add it up to 360 everything on it adds to 300 so that makes x 60.
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