☆ ADVANCED LEVEL : 2 ☆☆ INTERMEDIATE LEVEL : 0 ☆☆☆ ELEMENTARY LEVEL : 0 NONE : 2 ALL : 4

• 직사각형 (直四角形) : 안쪽의 네 각이 모두 직각을 이루고 있으면서 가로와 세로의 길이가 다른 사각형. ☆ Noun
🌏 RECTANGLE: A parallelogram with four right angles of which the sides are of different lengths.

• 정사각형 (正四角形) : 네 변의 길이와 네 각의 크기가 모두 같은 사각형. ☆ Noun
🌏 SQUARE: A rectangle having all four sides of equal length and all four angles of equal degree.

• 정삼각형 (正三角形) : 세 변의 길이와 세 각의 크기가 모두 같은 삼각형. Noun
🌏 REGULAR TRIANGLE: A triangle having all three sides of equal length and all three angles of equal degree.

• 직삼각형 (直三角形) : 수학에서, 안쪽의 한 각이 직각인 삼각형. Noun
🌏 RIGHT TRIANGLE: In mathematics, a triangle of which one of the angles is a right angle.

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