90 degrees angles or right angles.
a 90 digree angle
4 sides
The figure described is a rectangle. A rectangle has two pairs of equal sides, four right angles (formed by perpendicular lines), and opposite sides that are parallel. This geometric shape is a specific type of parallelogram and is characterized by its right angles and equal opposite sides.
The quadrilateral described is a rhombus. A rhombus has all four sides of equal length and opposite angles that are congruent, with adjacent angles being supplementary. This means it can have two distinct pairs of congruent angles, satisfying the condition mentioned. Additionally, a rhombus can be considered a special type of parallelogram.
In general the 4 interior angles of any quadrilateral always add up to 360 degrees
Adjacent angles
There are many types of angles such as obtuse, right, acute, complementary, supplementary, adjacent, alternate, corresponding, and opposite angles, just to name a few.
a 90 digree angle
kite
4 sides
rectangle
All rhombuses have two pairs of congruent angles (opposite angles are congruent to one another - a square is a special case type of rhombus in which all four angles are congruent).
DNA strands are held together by hydrogen bonds.
Hydrogen bonds hold the bases together in pairs in DNA. These bonds form between the nitrogenous bases adenine and thymine, and guanine and cytosine in a complementary manner, contributing to the overall stability and structure of the DNA molecule.
Hydrogen bonds are responsible for binding nucleotides on each strand of a DNA molecule. These bonds form between complementary base pairs: adenine (A) pairs with thymine (T) and guanine (G) pairs with cytosine (C).
Covalent bonding occurs between the nucelotides between the phosphate, deoxyribose sugar and organic base of a single DNA strand and hydrogen bonding holds the complementary bases of two DNA strands together.
The figure described is a rectangle. A rectangle has two pairs of equal sides, four right angles (formed by perpendicular lines), and opposite sides that are parallel. This geometric shape is a specific type of parallelogram and is characterized by its right angles and equal opposite sides.