Mr. Kaku is my best friend.

One angle of this triangle is 90 degrees.

I saw a crane in the park.

He was building a sand castle on the seashore.

What is the number of strokes in this kanji character?

In that company, he is truly a great man standing out among the crowd.

My pet owner is very kind.

Distance education is a great way to overcome geographical constraints.

He became aware and admitted his own mistakes.

He is acting with self-consciousness.