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c) What is value of right angle?​

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Answer:

90 degrees

Step-by-step explanation:

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90 degrees
A right angle has a value of 90 degrees (90∘ ). A right triangle is a triangle in which one angle is a right angle. The relation between the sides and angles of a right triangle is the basis for trigonometry. The side opposite the right angle is called the hypotenuse (side c in the figure).