Ayala Carlson
01/08/2024 · Junior High School

The drameter length of the circumcircle of \( \triangle \mathrm{ABC} \) in which a \( =8 \mathrm{sin} \mathrm{Acm} \) equals \( \begin{array}{llll}\text { a) } 4 & \mathrm{~cm}\end{array} \)

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To find the diameter of the circumcircle of triangle \( \triangle ABC \), we can use the formula for the circumradius \( R \) of a triangle, which is given by: \[ R = \frac{a}{2 \sin A} \] where \( a \) is the length of side \( a \) opposite angle \( A \). From the problem, we have: \[ a = 8 \sin A \text{ cm} \] Substituting this into the formula for \( R \): \[ R = \frac{8 \sin A}{2 \sin A} = \frac{8}{2} = 4 \text{ cm} \] The diameter \( D \) of the circumcircle is given by: \[ D = 2R \] Thus, substituting the value of \( R \): \[ D = 2 \times 4 = 8 \text{ cm} \] Therefore, the diameter of the circumcircle of triangle \( \triangle ABC \) is \( 8 \text{ cm} \). The answer provided in the options seems to be incorrect as it states \( 4 \text{ cm} \). The correct diameter is \( 8 \text{ cm} \).

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The diameter of the circumcircle is \( 8 \text{ cm} \).
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