Angle and Triangle Flash Cards You need 15 index cards for this!
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Transcript of Angle and Triangle Flash Cards You need 15 index cards for this!
![Page 1: Angle and Triangle Flash Cards You need 15 index cards for this!](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649f575503460f94c7b43a/html5/thumbnails/1.jpg)
Angle and Triangle Flash Cards
You need 15 index cards for this!
![Page 2: Angle and Triangle Flash Cards You need 15 index cards for this!](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649f575503460f94c7b43a/html5/thumbnails/2.jpg)
Angle
A
B C
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Two rays with a common endpoint called a vertex.
Always name an angle with the vertex in the middle.
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Adjacent Angles
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Angles that share a vertex and a side.
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Congruent Angles
64° 64° Y X
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Angles with the same measure.
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Vertical Angles
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Angles formed by intersecting lines and are opposite each
other.
Vertical angles are always congruent!
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Acute Angles
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The measure of the angle is less than 90°.
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Obtuse Angles
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The measure of the angle is greater
than 90° and less than 180°.
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Right Angles
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The measure of the angle is 90°.
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Complementary Angles
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The sum of the two angles is 90°.
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Supplementary Angles
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The sum of the two angles is 180°.
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SCALENE TRIANGLE
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All three sides have different lengths:
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ISOSCELES TRIANGLE
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Has at least 2 congruent sides
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EQUILATERAL TRIANGLE
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All three sides are congruent
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ACUTE TRIANGLE
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All of the angles are acute
(less than 90°)
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OBTUSE TRIANGLE
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One obtuse angle
(greater than 90 less than 180)
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RIGHT TRIANGLE
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Has one right angle (90°)