平角 (píng jiǎ) — straight angle | TongTong Chinese Dictionary

Definition

A geometric term for a straight angle of 180°, forming a flat line. Distinct from 直角 (90° right angle) and 钝角 (obtuse angle).

noun

straight angle

Examples

平角。
Yí gè píng jiǎ děng yú liǎng gè zhí jiǎo.
A straight angle equals two right angles.
平角。
Lǎo shī ràng wǒ men zài zhǐ shàng huà yí gè píng jiǎ.
The teacher asked us to draw a straight angle on paper.
平角180。
Zhè ge píng jiǎ de jiǎo dù zhèng hǎo shì 180 dù.
The angle of this straight angle is exactly 180 degrees.

Origin

Compound word

构词法gòucífǎ

偏正piānzhèngModifier + head

The first part narrows down the second: it says what kind of thing the head is.

平píngflat/straight

平 “flat/straight” describes 角 “angle”, giving a straight angle.

Characters in this word

Two or more meaningful parts placed together so that their meanings combine into a new one.

八八bādivision
亏亏kuīexhaled air

The origin is uncertain. One explanation combines 八 (division) and 亏 (exhaled air) to show smooth speech.

A drawing of the thing itself, worn down over three thousand years into a few strokes.

The form 角 is a picture of a horn.

Appears in

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