Find the radius of the circum-circle of a triangle in which angle A = 69^o and a = 3.95 cm.

      

Find the radius of the circum-circle of a triangle in which angle A = 69^o and a = 3.95 cm. Give your answer to four significant figures

  

Answers

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$\frac{a}{sin A}$ = 2R;

$\frac{3.95}{sin\; 69^o}$ = 2R

$\frac{3.95}{2(sin\; 69^o)}$ = R;R = $\frac{3.95}{1.867}$

R = 2.116

Radius of the circumcircle is

2.116 cm

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johnmulu answered the question on March 7, 2017 at 09:00

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