Answer:
what number must be added to sum of two angles that the sum of three angles become 180.
Since sum of two angles is 100 , 80 must be added to 100 to make it equal to 180.
Step-by-step explanation:
Given
sum of measure of angle of triangle = 180°
given two angles 40°and 60°
Let the third angle be x°
thus
40°+ 60°+x° = 180°
100°+x° = 180°
x° = 180°- 100° = 80°
Thus, third angle measure 80°
She must have sum the first two known angles.
as given sum of three angles are 180
she must have assumed other angle to be x
then sum of all three angles must be 180
now to find third angle she subtracted sum of two known angles to find third angle.
other way can what number must be added to sum of two angles that the sum of three angles become 180.
Since sum of two angles is 100 , 80 must be added to 100 to make it equal to 180.
