Question

9. Find the measures of the angles of a triangle if one of the angles is 140° and the other two angles are equalplease solve this problem ​

Answer 1

Answer:

20°

Step-by-step explanation:

let the other two angle be x

=>then,x+x+140=180

=>2x+140=180

=>2x=180-140

=>x=40/2=20

=>x=20

therefore,the other angles are 20°.

Answer 2

Answer:

20 degrees , 20 degrees , 140 degrees

Step-by-step explanation:

take one of the equal angles as X

we know that there are 3 angles in a triangle.

given angles

angle 1=X

angle 2=X       -cuz given that two angles are equal

angle 3= 140 degrees

according to Angle sum property of a triangle

angle 1 + angle 2 + angle 3 = 180 degrees

therefore X+X+140=180

2X=180-140

2X=40

X=40/2=20 degrees

therefore one of the equal angles= 20 degrees