Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. ∆ABC rotates 90° clockwise about point P to form ∆A′B′C′.

The correct answer is ∠B' = 50°, ∠A' = 70°, and ∠C' = 60°.
A figure has shown, ∆that ABC rotates 90° clockwise about point P to form ∆A′B′C′.
The triangle is a geometric shape that includes 3 sides and the sum of the interior angle should not be greater than 180°.
Since ∆that ABC rotates 90° clockwise about point P to form ∆A′B′C′.
Rotation of the triangle about a fixed point will not change its dimension, But it definitely changes the triangle orientation.
So, the dimension of the rotated triangle is ∠B' = 50°, ∠A' = 70°, and ∠C' = 60°.
Thus, the correct answer can be filled in the box is the correct answer is ∠B' = 50°, ∠A' = 70°, and ∠C'= 60°.
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