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It is literally saying that because the angle is perfect,the angle isn't wrong, it is a right angle, it is considered right or true. The word "right" is used for this angle because the word has the meaning of "true" or "correct." When a carpenter is building a house and he positions a wall, he wants that wall to be correctly placed; to be "right" or "true."

The presence of a right angle in a triangle is the defining factor for right triangles, making the right angles basic to trigonometry. The term is a calque of Latin angulus rectus; here rectus means "upright", referring to the vertical perpendicular to a horizontal base line.

Q: Why is a right angle called a right angle?

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Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!

Because a right angle is a right angle.

A right angle triangle

It is called a right angle triangle.

This is called a right angle.

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Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!

Because a right angle is a right angle.

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A right angle triangle

It is called a right angle triangle.

right...Each corner of a square is called a "right angle" and measures 90 degrees with a protractor.a 90o angle, also called a right angle

In a right angle triangle, the line across from the riht angle is called the hypotenuse.

A right angle

right angle

Straight angle

This is called a right angle.

A square corner is a 90° angle which is called a "Right angle".