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25 Cards in this Set
- Front
- Back
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Acute angles |
a angle smaller than a right angle (it is less than 90 degrees and more than 0 degrees). |
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Angle |
the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.
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obtuse angle |
The obtuse angle is the smaller angle. It is more than 90° and less than 180°.
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Right Angle |
an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
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Straight angle |
an angle of 180°.
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vertex of an angle |
The point about which an angle is measured is called the angle's vertex, and the angle associated with a given vertex is called the vertex angle.
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Adjacent angles |
Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap.
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complementary angle |
either of two angles whose sum is 90°.
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supplementary angle |
either of two angles whose sum is 180°.
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vertical angles |
each of the pairs of opposite angles made by two intersecting lines.
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intersecting angles |
Adjacent angles share a common vertex and a common ray. Two intersecting lines form pairs of adjacent angles that are supplementary.
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center of a circle |
The center-radius form of the circle equation is in the format (x – h)2 + (y – k)2 = r2, with the center being at the point (h, k) and the radius being "r". This form of the equation is helpful, since you can easily find the center and the radius.
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diameter |
a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
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radius |
In classical geometry, a radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is the length of any of them.
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circumference of a circle |
The circumference of a circle is the distance around it. The term is used when measuring physical objects, as well as when considering abstract geometric forms. When a circle'sdiameter is 1, its circumference is π. When a circle's radius is 1—called a unit circle—its circumference is 2π.
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pi |
the sixteenth letter of the Greek alphabet ( Π, π ), transliterated as ‘p.’.
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area of a cirlce |
The distance around a circle is called its circumference. The distance across a circlethrough its center is called its diameter. We use the Greek letter (pronounced Pi) to represent the ratio of the circumference of a circle to the diameter. ... The area of a circle is the number of square units inside that circle.
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segment |
each of the parts into which something is or may be divided.
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triangle |
a plane figure with three straight sides and three angles.
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Equilateral Triangle
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In geometry, an equilateral triangle is a triangle in which all three sides are equal
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Isosceles Triangle
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in geometry, an isosceles triangle is a triangle that has two sides of equal length.
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scalene triangle |
A scalene triangle is a triangle that has three unequal sides
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Right Triangle |
a triangle with a right angle.
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Obtuse triangle |
An obtuse triangle is a triangle in which one of the angles is an obtuse angle.
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Acute triangle |
An acute triangle is a triangle with all three anglesacute (less than 90°).
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