Questions: В окружность радиуса 7 вписан треугольник MFK так, что его сторона MK совпадает с диаметром окружности.
Определите длину стороны FK, если MF=4√10
Ваш ответ.
Transcript text: В окружность радиуса 7 вписан треугольник $\triangle M F K$ так, что его сторона $M K$ совпадает с диаметром окружности.
Определите длину стороны $F K$, если $M F=4 \sqrt{10}$
Ваш ответ.
За решение задачи +25 XP
Solution
Solution Steps
To solve this problem, we can use the properties of a triangle inscribed in a circle. Since \( MK \) is the diameter, triangle \( \triangle MFK \) is a right triangle with the right angle at \( F \). We can use the Pythagorean theorem to find the length of side \( FK \).
Identify that \( MK \) is the diameter of the circle, so its length is twice the radius.
Use the Pythagorean theorem in the right triangle \( \triangle MFK \) to solve for \( FK \).
Step 1: Determine the Length of the Diameter
The diameter of the circle is twice the radius. Given that the radius is \(7\), the diameter \(MK\) is:
\[
MK = 2 \times 7 = 14
\]
Step 2: Apply the Pythagorean Theorem
Since \(MK\) is the diameter, \(\triangle MFK\) is a right triangle with the right angle at \(F\). We can use the Pythagorean theorem to find the length of \(FK\):
\[
MK^2 = MF^2 + FK^2
\]
Substituting the known values:
\[
14^2 = (4\sqrt{10})^2 + FK^2
\]
\[
196 = 160 + FK^2
\]
Step 3: Solve for \(FK\)
Rearrange the equation to solve for \(FK^2\):
\[
FK^2 = 196 - 160 = 36
\]
Taking the square root of both sides gives:
\[
FK = \sqrt{36} = 6
\]