Find the outer angle at the third apex of the triangle if the other two angles are equal; 1) 54 and 36;

Find the outer angle at the third apex of the triangle if the other two angles are equal; 1) 54 and 36; 2) 42 and 78; 3) 65 and 35; 4) 33 and 120.

We know that the outer angle of a triangle is equal to the sum of the angles of the triangle that are not adjacent to it.

1) Therefore, the outer angle at the third vertex of the triangle, if the other two angles are equal to 54 degrees and 36 will be equal to:

54 + 36 = 90 degrees.

Answer: 90 degrees;

2) The outer angle at the third vertex of the triangle, if the other two angles are 42 degrees and 78 will be:

42 + 78 = 120 degrees.

Answer: 120 degrees;

3) The outer angle at the third vertex of the triangle, if the other two angles are equal to 65 degrees and 35 will be equal to:

65 + 35 = 100 degrees.

Answer: 100 degrees;

4) The outer angle at the third vertex of the triangle, if the other two angles are equal to 33 degrees and 120 will be equal to:

33 + 120 = 153 degrees.

Answer: 153 degrees.