Given: ΔABC; a= 10; b = 13, and ∠C = 70°. Find the length of side c to the nearest whole number

asked Aug 17, 2020 52.0k views

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Answer:

$c=13\ units$

Explanation:

we know that

Applying the law of cosines

c^2=a^2+b^2-2(a)(b)cos(C)

we have

$a=10\ units\\b=13\ units\\C=70\°$

substitute

$c^2=10^2+13^2-2(10)(13)cos(70\°)$

c^2=180.07

$c=13\ units$

Ceridan answered Aug 23, 2020

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