zhè zhǒng / sì biān xíng / jiào zuò / zhēng xíng / tā / de / liǎng tiáo / duì jiǎo xiàn / hù xiāng / chuí zhí

这种四边形叫做筝形，它的两条对角线互相垂直。

This type of quadrilateral is called a kite; its two diagonals are perpendicular to each other.