The answer is a) true
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Answer: Leonardo Da Vinci, Michelangelo, Titan,Raphael.
Explanation:
Answer:
A straight angle measures 180°. ... An angle can be measured using a protractor, and the angle of measure 90 degrees is called a right angle. In a right angle, the two arms are perpendicular to each other. When the right angle is divided into two equal parts each angle measures 45°.