

この二本の線の角度を測ってください。
光が当たる角度によって、色が違って見えます。
この三角形の角度の合計は何度になりますか。
"かくど(角度)" is in the lesson "Science" (Level 39), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.