ΔABC is an isosceles triangle in which angles B and C are congruent. If m∠B = (2x + 16)° and m∠C = (3x - 11)°, find the measure of angle A.
A) 27°
B) 40°
C) 60°
D) 70°
https://www.usatestprep.com/modules/gallery/files/85/8561/8561.jpg

Question

ΔABC is an isosceles triangle in which angles B and C are congruent. If m∠B = (2x + 16)° and m∠C = (3x - 11)°, find the measure of angle A.
A)	27°	
B)	40°	
C)	60°	
D)	70°
https://www.usatestprep.com/modules/gallery/files/85/8561/8561.jpg

Livxxx · Answer

Which answer choice could you mark off first?

Shantelsurry · Answer

A

AZ · Answer

If the angles are congruent then that means they are equal to each other. 
m∠B = m∠C

First you have to solve for x
(2x + 16) = (3x - 11)

Can you solve for x or do you know how to?

AZ · Answer

It's not the correct answer

AZ · Answer

And you asked her what she could eliminate...??

draebrewer · Answer

what do u think the asnwer is

AZ · Answer

Anyway, remember first we have to solve for x

and then we substitute that number back in to 2x + 16 so we can find the value of angle B

and since angle B = angle C

we can then use the fact that

m∠A + m∠B + m∠C = 180 degrees

and solve for angle A