radomes.openskiesproject.org
Qlizzle Qlizzle
  • 26-01-2015
  • Mathematics
Answered

In ΔABC, if m∠A = 43° and m∠C = 66°, then find m∠B.

(Points : 3)

71°

47°

114°

109°

Verified Answer :

naǫ
naǫ naǫ
  • 26-01-2015

The measures of the angles in a triangle add up to 180°.
\(m \angle A + m \angle B + m \angle C = 180^\circ \\ m \angle A=43^\circ, \ m \angle C = 66^\circ \\ \downarrow \\ 43^\circ+ m \angle B + 66^\circ = 180^\circ \\ m \angle B + 109^\circ = 180^\circ \\ m \angle B =180^\circ - 109^\circ \\ \boxed{m \angle B=71^\circ}\)

Answer Link

Related Questions

Choose the product of 2x102
HELP I am in the computer lab right now and I need legit reasons why i should work on a laptop instead of a computer I dont like people staring at my work
why is antibacterial resistance a problem please help me
a spinner with 12 equal sectors labeled 112 is spun find Pprime number
If you were to travel between Nigeria and Ethiopia would you have to put your watch forward or back
Massachusetts and Virginia were started for religious freedom a True b False
What does Churchill claim that the Soviet Union wanted
208v i dont know how to do this
How do you convert the number of molecules of a substance to the number of moles a add Avogardos number b subtract Avogardos number c multiply Avogardos number
A clerk takes 34 h to process 9 applications How long does it take the clerk to process 1 application