Angles of a triangle (review) | Geometry (article) | Khan Academy
https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-triangle-angles/a/triangle-angles-review
webAll three angles in any triangle always add up to 180 degrees. So if you only have two of the angles with you, just add them together, and then subtract the sum from 180. EX: A Triangle has three angles A, B, and C. Angle A equals 60, Angle B equals 84. What is the measure of angle C? Step 1| (A)60 degrees + (B)83 degrees = 143 degrees
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