Answer:
photo 1: D. a + b = 180
photo 2:
a. interior angles of a triangle
b. vertical angles
c. complementary angles
d. supplementary angles
photo 3:
a. 82
b. 82
photo 4:
a. 51
b. 129
photo 5: x = 60
Explanation:
The interior angles of a triangle are the angles that are inside the triangle and are formed by the intersection of two sides of the triangle. In a triangle, there are always three interior angles.
The sum of the interior angles of a triangle is always 180 degrees. This is because the interior angles of a triangle are supplementary, meaning that they add up to 180 degrees.
Vertical angles are two angles that are opposite each other and are formed by two intersecting lines. The lines that intersect to form the vertical angles are called "arms" of the angles.
Vertical angles are always congruent, which means that they have the same measure
Complementary angles are two angles whose measures add up to 90 degrees. In other words, if two angles are complementary, then one angle is the complement of the other.
Supplementary angles are two angles whose measures add up to 180 degrees. In other words, if two angles are supplementary, then one angle is the supplement of the other.