Last Updated：2025/11/21

(geometry) An angle that, when added to another referenced angle, produces an angle of 180 degrees.

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supplementary angle

Source Word

supplementary angle

Noun

(geometry) An angle that, when added to another referenced angle, produces an angle of 180 degrees.

Japanese Meaning

補角：ある角度と合わせて180度になる角度

When you calculate the missing value, remember that the supplementary angle must measure 110 degrees.

欠けている値を求めるとき、与えられた角と合わせて180度になる角（補角）が110度であることを忘れないでください。

Sense（1）

(geometry) An angle that, when added to another referenced angle, produces an angle of 180 degrees.

Angle A is 40°, and its complementary angle, B, is 140°.

supplementary angles

（ plural ）