The shadow of a telegraph pole 5.1 m high, if the shadow of a pole 1.7 m high is 2.1 m.
March 7, 2021 | education
| Let us prove that triangle ACD is similar to triangle ABK.
Both triangles are straight, since CD and BK are perpendicular to AD, and the angle A is common for the triangles, then the triangles ACD and ABK are similar in acute angle.
CD / BK = AD / AK.
5.1 / 1.7 = AD / 2.1.
1.7 * AD = 5.1 * 2.1.
1.7 * AD = 10.71.
AD = 10.71 / 1.7 = 6.3 m.
Answer: The length of the shadow from the telegraph pole is 6.3 meters.
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