• the side PQ, which is opposite to the right angle PRQ is called the hypotenuse. • the side RQ is called the adjacent side of angle θ . In geometry, the term "diagonal" refers to a segment connecting two vertices that does not form a polygon's side. As adjectives the difference between adjacent and parallel is that adjacent is lying next to, close, or contiguous; neighboring; bordering on while parallel is equally distant from one another at all points. The red line is perpendicular to the blue line: Here also: (The little box drawn in the corner, means "at right angles", so we didn't really need to also show that it was 90°, but we just wanted to!). ∴ They form perpendicular lines. The quadrilaterals that have perpendicular diagonals are "square," "rhombus" and "kite." Jay Willis. rhombus because its length and width are both units and adjacent sides are not perpendicular . two adjacent sides of a parallelogram measure 15 cm and 20 cm while the diagonal opposite their common vertex measure 25 cm.find the area of he parallelogram. Adjacent sides of parellogram are 36cm and 27cm in length. In a square or a rectangle, all the adjacent sides form perpendicular lines. • If a transversal is perpendicular to one of a pair of parallel lines (or several parallel lines), it must be perpendicular … Each of the four altitudes of a quadrilateral is perpendicular to a side through the midpoint of the opposite side. Adjacent: It is the side adjacent to the angle being considered. To remove this confusion, we will name different sides of the right-angled triangle as adjacent, opposite and hypotenuse. rectangle because its length is units, its width is units, and adjacent sides are perpendicular Try for yourself: Math. Sides of a right-angled triangle enclosing the right angle are perpendicular to each other. Published by. ∠BAD and ∠CAD are adjacent angles, with non-adjacent, perpendicular sides AB and AC. ∴ They do not form perpendicular lines Ex 5.5, 1 Which of the following are models for perpendicular lines : (c) The line segments forming the letter ‘L’. Perpendicular and Parallel Perpendicular. If two adjacent angles have their exterior sides in perpendicular lines, then the angles are complementary. Note: The adjacent and the opposite sides depend on the angle θ. Opposite: It is the side … A right trapezoid has two pairs of adjacent sides that are perpendicular. • the side PR is called the opposite side of angle θ . A kite is a quadrilateral (4 sided figure) with two pairs of adjacent sides of equal length; its diagonals are perpendicular. trapezoid because it has only one pair of parallel sides . A triangle has 3 sides. 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