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A quadrilateral has angles that measure 87°, 69°, and 104°. What is the measure of the fourth angle?
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A quadrilateral has angles that measure 87°, 69°, and 104°. What is the measure of the fourth angle?

User Hassaan
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Sum of angles of quadrilateral = 360

87 + 69+ 104 + x = 360

156 + 104 +x = 360

260 + x = 360

thus, x = 100

Thus, the measure of the fourth angle is 100 degrees
User Kyle Boon
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The answer should be ................... 100
User TylerNG
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A quadrilateral has angles that measure 87° 69° in 104° what is the measurement of the fourth angle
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