Question

find the unknown lettered angle .​

Answer 1

Answer:

The sum of the interior angles of a triangle is always 180 degrees. Since you already know two of the angles, simply subtract them from 180.

180−(60+80)

=180−(140)

=40

Answer 2

Answer:

80°.

Step-by-step explanation:

We know that,

Sum of all angles in a triangle =180°

On using this on the triangle given above, we have,

60°+40°+x = 180°

100°+x = 180°

x = 180°-100°

x = 80°

Therefore, the value of x is 80°.

Hope it helps you.

Good Luck.