All triangles that are not right triangles.
Rectangle, octagon, hectagon, square...
Angles between 90 and 180 degrees are called obtuse angles. These angles are larger than a right angle but smaller than a straight angle, which measures 180 degrees. Obtuse angles are often found in various geometric figures and can impact the properties of shapes and the relationships between lines.
a circle
An acute triangle.
A circle.
Circle, cone, cylinder, sphere and equilateral triangle for example.
In mathematics, similar figures are shapes that have the same shape but may differ in size. This means that their corresponding angles are equal, and their corresponding sides are in proportion. For example, two triangles are similar if their angles are the same, even if one is larger or smaller than the other. Similar figures maintain the same geometric properties, enabling comparisons and calculations based on their proportional relationships.
130 and 50 degrees.
An equilateral triangle, which has 3 angles of 60o.
112.5 degrees
Supplementary angles are two angles whose measures add to 180 degrees. Adjacent angles are two angles that happen to lie next to each other, so that they combine to form a larger angle whose measure is the sum of the measures of the adjacent angles. Angles may be both adjacent and supplementary, in which case they will form a straight angle.
When two angles share a common vertex and a common ray, they are called adjacent angles. Adjacent angles are positioned next to each other and do not overlap. They can be part of a larger geometric figure, such as a triangle or a polygon.