When the host standing position P is the golden section point of stage AB, the sound effect is the best. So you think the distance of AP should be equal to () A. 10 m B.10 (root 5-1) m C.10 (3-root 5) m d.10 (root 5-1) or 10 (3-root 5) M

When the host standing position P is the golden section point of stage AB, the sound effect is the best. So you think the distance of AP should be equal to () A. 10 m B.10 (root 5-1) m C.10 (3-root 5) m d.10 (root 5-1) or 10 (3-root 5) M

100 million of the golden ratio is BP squared equal to AP times AB, so
The golden ratio is (√ 5-1) / 2. I didn't give a number to the title, so I found a similar one

It is most natural and appropriate for a host to stand at the golden section of the stage. If the stage AB is 20m long and the host is standing at a now, he should walk at least () m more
Why is the answer given in my homework 10 (root 5-1)
Explain why

20 times (1 minus half root, 5 minus 1)
The answer should be 20 times 3 / 2 minus the root sign 5
Give me a point

As shown in the picture, if the length of stage AB is 20m, try to calculate the host
We should go to point a - --- meters

Directly multiply the length of AB by the golden section ratio, that is, 20 * (√ 5-1) / 2m, that is, (10 * √ 5-10) m, which is about 12.36m
Of course, according to your meaning (closer to a, farther from b), it should be 20 * (1 - (√ 5-1) / 2) m, that is, 30-10 * √ 5 m, which is about 7.64m