Adjacent angles add up to 180 degrees. (d and c, c and a, d and b, f and e, e and g, h and g, h and f are also adjacent). These add up to 180 degrees (e and c are also interior). Any two angles that add up to 180 degrees are known as supplementary angles.

## What is the adjacent side of a triangle?

In a right triangle, the hypotenuse is the longest side, an “opposite” side is the one across from a given angle, and an “adjacent” side is next to a given angle.

Adjacent Angle Examples Both these pairs of angles i.e.∠AOC and ∠COB lie next to each other and are known as adjacent angles. ∠AOC and ∠COB have a common vertex, a common arm and the uncommon arms lie on either side of the common arms. Such angles are known as adjacent angles.

What is the sum of adjacent angles of a triangle?

The sum of the interior angles of a triangle is always 180 degrees. The exterior angle is the angle between any side of a shape, and a line extended from the next side. The sum of an exterior angle and its adjacent interior angle is also 180 degrees.

### Do adjacent angles equal 90?

In the figure above, the two angles ∠PQR and ∠JKL are complementary because they always add to 90° Often the two angles are adjacent, in which case they form a right angle. In a right triangle, the two smaller angles are always complementary. Similar in concept are supplementary angles, which add up to 180°.

### What are pairs of adjacent angles?

Adjacent angles are two angles that have a common vertex and a common side but do not overlap. In the figure, ∠1 and ∠2 are adjacent angles. They share the same vertex and the same common side. In the figure, ∠1 and ∠3 are non-adjacent angles.