Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.
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Transcript of Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.
![Page 1: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/1.jpg)
Basic Definitions in Geometry
![Page 2: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/2.jpg)
Acute Angle
• An angle that measures between 0 and 90 degrees.
![Page 3: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/3.jpg)
Right Angle
• Angle that measures 90 degrees and formed by perpendicular lines.
![Page 4: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/4.jpg)
Obtuse Angle
• An angle that measures between 90 and 180 degrees.
![Page 5: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/5.jpg)
Straight Angle
• An angle that measures 180 degrees.
![Page 6: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/6.jpg)
Reflex Angle
• An angle that measures between 180 and 360 degrees.
![Page 7: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/7.jpg)
Complementary Angle
• Two angles that add up to 90 degrees.
![Page 8: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/8.jpg)
Supplementary Angles
• Two angles that add up to 180 degrees.
![Page 9: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/9.jpg)
Equilateral Triangle
• A triangle that has 3 equal sides.
![Page 10: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/10.jpg)
Equiangular Triangle
• A triangle that has 3 equal angles and each measures 60 degrees (sum is 180).
![Page 11: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/11.jpg)
Scalene Triangle
• Triangle with different sides and angles.
![Page 12: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/12.jpg)
Isosceles Triangle
• A triangle that has two equal sides and two equal base angles.
![Page 13: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/13.jpg)
Vertical Angles
• Two angles in which the sides of one angle are opposite rays to the sides of the second angle.
![Page 14: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/14.jpg)
Adjacent Angles
• Two angles having a common vertex and a common side, but do not have any interior points in common.
![Page 15: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/15.jpg)
Line Segment
• 2 points called endpoints and all of the points in between them.
![Page 16: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/16.jpg)
Ray
• A part of a line that consists of a point on the line, called the endpoint, and all of the points on one side of the line.
![Page 17: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/17.jpg)
Opposite Rays
• Two rays of the same line with a common endpoint and no other points in common.
![Page 18: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/18.jpg)
Collinear
• A set of points all lying on the same straight line.
![Page 19: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/19.jpg)
Midpoint
• The point of a line segment that divides it into 2 congruent (equal) parts.
![Page 20: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/20.jpg)
Bisector
• A line, ray, or segment which divides a segment into 2 congruent parts.
![Page 21: Basic Definitions in Geometry. Acute Angle An angle that measures between 0 and 90 degrees.](https://reader036.fdocuments.net/reader036/viewer/2022062314/56649d975503460f94a80aea/html5/thumbnails/21.jpg)
Perpendicular Lines
• Two lines that intersect to form right angles.
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Altitude
• The perpendicular segment from a vertex of a polygon to the opposite side.
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Median
• A segment that joins any vertex of a triangle to the midpoint of the opposite side.