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Trace the triangle on tracing paper, flip the tracing paper so the drawn triangle is touching the paper and then put your pencil on the point (with the tracing paper underneath) that you need to rotate from. Then rotate the paper 90 degrees and draw over the triangle you drew on the tracing paper to stamp it down.
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What is a triangle with an angle smaller than 90 degrees?
All triangle must have at least two angles smaller than 90 degrees. There is no point in having a special name for something that always happens.
What type of triangle has an angle that measures 20 degrees and and angle that measures 90 degrees?
Any triangle that has an angle measuring 90 degrees is a right triangle.
What triangle has angles that measure 46 degrees 90 degrees and 44 degrees?
A right triangle.
What is a triangle with a 90 degrees called?
a right triangle
What is a rotation of 90 degrees about the origin?
You could rotate it in either direction, like a steering wheel. -- If you rotate the whole plane 90 degrees to the left, then the old x-coordinate of every point becomes its new y-coordinate, and its old y-coordinate becomes its negative x-coordinate. -- If you rotate the whole plane 90 degrees to the right, then the old x-coordinate of every point becomes its new negative y-coordinate, and its old y-coordinate becomes its new x-coordinate.
