As shown in the figure, angle AOB = 30 degrees, Op bisects angle AOB, PD is parallel to OA, intersection ob at point D, PE is perpendicular to OA at point E, if od = 5cm, PE length is calculated Help. School is about to start.

As shown in the figure, angle AOB = 30 degrees, Op bisects angle AOB, PD is parallel to OA, intersection ob at point D, PE is perpendicular to OA at point E, if od = 5cm, PE length is calculated Help. School is about to start.

Make DF through point D and perpendicular to point F
Because DF is perpendicular to OA
So the angle DFO = 90 degrees
So the triangle ofd is a right triangle
Because AOB = 30 degrees
So FD = 1 / 2od
Because od = 5, FD = 2.5
Because PE is perpendicular to OA, DF is perpendicular to OA
So PE is parallel to BF
Because PD is parallel to OA,
So the quadrilateral epdf is a parallelogram,
So PE = DF
So PE = 2.5

In the coordinate system, the distance between P (2, - 2) and Q (2,4) is equal to_____ Unit length?

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