1.
right angle
An angle of exactly 90 degrees.
直角は90度だ。
A right angle is 90 degrees.
この二つの線は直角に交わっている。
These two lines intersect at a right angle.
直角三角形には一つの直角がある。
A right triangle has one right angle.
直角 means a right angle (90 degrees). The kanji combine 直 (straight, direct) and 角 (angle, corner).
COMMON EXPRESSIONS:
- 直角に曲がる: to turn at a right angle
- 直角に交わる: to intersect at right angles
- 直角三角形: right triangle
ANGLE TYPES:
- 鋭角: acute angle (less than 90°)
- 直角: right angle (exactly 90°)
- 鈍角: obtuse angle (more than 90°)
EVERYDAY USE:
Also used outside mathematics to describe perpendicular arrangements: この棚は壁に直角に置いてある (This shelf is placed at a right angle to the wall).