Question

Two angles of triangle are 70 and 30. Find the third angle.​

Answer 1

Answer:

given, the two angles are- 70° and 30°

suppose the third angle is =x

we know that,

the total of the angles of a triangle is =180°

now, 70°+30°+x=180°

= 100° +x= 180°

= x= 180°-100°

so, x=80°

the third angle is 80°

Answer 2

Answer:

Third angle is 80°.

Step-by-step explanation:

Let the 3rd angle be 'x° '

1st angle = 70°

2nd angle = 30°

By,

Angle Sum Property

1st+2nd+3rd = 180°

70°+30°+x° = 180°

100° +x° = 180°

x = 180 - 100

x = 80°