40
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90/6 = 15
a right triangle has one right angleA triangle with a right angle is a right triangle.
If one angle is a right angle, it is a right triangle. If one angle is an obtuse angle, it is an obtuse triangle. If there are no right nor obtuse angle then it is an acute triangle.
A triangle with one angle measuring 90˚ is a right triangleIt's a right triangle because the 90˚ angle is a right angle
you just draw one right angle and draw one half of a right angle and connect them together and wella you got one.