Definition

Examples

• 三角形的三个内角之和等于180度。
  Sānjiǎoxíng de sān gè nèi jiǎ zhī hé děngyú yìbǎi bāshí dù.
  The sum of the three interior angles of a triangle is 180 degrees.
• 这个正五边形的每个内角都是108度。
  Zhège zhèng wǔbiānxíng de měi ge nèi jiǎ dōu shì yìbǎi líng bā dù.
  Each interior angle of this regular pentagon is 108 degrees.
• 计算多边形的内角需要知道边数。
  Jìsuàn duōbiānxíng de nèi jiǎ xūyào zhīdào biān shù.
  To calculate the interior angles of a polygon, you need to know the number of sides.