SOLUTION: Hi I have another question I would like to verify my answer to: In Δ ABC, find the value of ∠C, if a = 5.7 m, b = 3.9 m, and c = 7.7 m. answer : C=105 degrees

Algebra.Com
Question 483793: Hi I have another question I would like to verify my answer to:
In Δ ABC, find the value of ∠C, if a = 5.7 m, b = 3.9 m, and c = 7.7 m.
answer : C=105 degrees

Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!


Use the law of cosines











Use the inverse cosine function on your calculator,
being sure it is in degree mode, not radian mode.



to the nearest whole degree is 105°

Edwin
RELATED QUESTIONS

Triangle ABC has an exterior angle, ∠DAB, and two remote inner angles, ∠B and (answered by ankor@dixie-net.com)
Hi! 7. If AB < AC < CB in ΔABC, then which of the following is true? (1 point) (answered by josgarithmetic)
In ΔABC, the measure of ∠A is 36°. The measure of ∠B is three times the... (answered by ankor@dixie-net.com)
Hi - I'm finding this question a bit tricky and think I answered it wrong, can someone... (answered by cleomenius)
Solve ΔABC. Enter your numeric answer rounded to the nearest degree. m∠A =... (answered by Alan3354)
In triangle MNO, the measure of ∠N is 90°, and ∠M = ∠O. If ΔMNO... (answered by Edwin McCravy)
Hi am slightly stuck on this question on number theory. I have solved it up to a point... (answered by Alan3354)
In ΔABC, if m ∠A = m∠C, m∠B = ß (where ß is an acute angle), and... (answered by Fombitz)
In ΔABC, if m ∠A = m∠C, m∠B = ß (where ß is an acute angle), and... (answered by Fombitz,GrantJones,Alan3354)