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24bBNote: Figure not drawn to scale.In the triangle shown above, a = 4 cm, b = 6,5 cm, and c = 9.2 cm. What is the approximate measure of angle A?OA 37.51°OB. 22°O C. 19.67°OD. 33.170

24bBNote Figure not drawn to scaleIn the triangle shown above a 4 cm b 65 cm and c 92 cm What is the approximate measure of angle AOA 3751OB 22O C 1967OD 33170 class=

Respuesta :

Lengths are ,a= 4 cm, b = 6,5 cm, and c = 9.2 cm

Then Apply

Cos A= ( b^2 + c^2 - a^2 )/ 2bc

. = ( 6.5^2 + 9.2^2 - 4^2)/2•6.5•9.2

. = (42.25 + 84.64 - 16)/119.6

. = 0.927

Now find ArcCosin 0.927= 22.03

THEN answer is

OPTION B) 22°

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