Math
posted by Anonymous .
The exterior angle at C if a triangle is ABC IS =120 degree find the measure of all the angles of a triangle if angle A= angle B

C=180120=60
so, since B=A,
A+A=60 = 180
...
Respond to this Question
Similar Questions

Math
If the measures of the angles in a triangle are in the ration 3:4:5, the measure of the exterior angle of the triangle can not be a) 120D b)165D c)105D d)135D b 165 With the triangle ratio of 3:4:5 the equation can be made: 3x + 4x … 
Geometry
Writing indirect proofs. Can someone please check for me. I am not sure If this is correct.Thanks much Given: triangle ABC angle B=120 degree Proof: Triangle A does not equal 60 degree Plan: Using an indirect proof, using the paragraph … 
Geometry
Given: in triangle ABC, angle B= 120 degrees Prove: angle A does not= 60 degrees Plan: use indirect proof Assume temporarily that Measure angle A = 60. Then measure angle C=60, and measure angles A+B+C=180= 60+B+60=180. Therefore the … 
Geometry
The measure of an exterior angle of a triangle is 120. the interior angles that are not adjacent to this exterior angle are congruent. find the measures of the interior angles of the triangle 
geometry
find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct? 
geometry
find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct? 
math
One interior angle of a triangle has a measure that is equal to the sum of the measures of the other two angles of the triangle. What is the measure of the smallest exterior angle of the triangle in degrees? 
cwi
The sum of the measures of the angles of any triangle is 180 degrees. In triangle ABC, the measure of angle A is 70° more than the measure of angle B. The measure of angle B is twice the measure of angle C. Find the measure of each … 
Geometry
An exterior angle of an isosceles triangle has measure 150°. Find two possible sets of measures for the angles of the triangle. If the exterior angle of the bases is 150°, then the measure of the angle of each base is _° and … 
Col. Algebra
I'm needing help with understanding /solving this problem. Can you please help?