After the rotational transformation about point P to 120° the measure of ∠A' will be 40°
What is a rotational transformation ?
A rotational transformation is a rotating transformation about a point.
It ca be clockwise or anti clockwise and in it size and shape of the object remains same before and after the transformation.
In the given question
The Figure shows the two triangles.
Triangle ABC is the original triangle and A'B'C' is the triangle after the rotation of 120°.
In rotational transformation the size and shape of the object stays exactly the same. Then the angle measures are also remains the same.
So measure of angle A' is
Hence we can observe that after rotational transformation, the measure of angle ∠A' = 40°.
Learn more about Rotational transformation here :
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