PowerPoint Presentation · 2019. 8. 1. · Parallel lines have the same slope but different...
Transcript of PowerPoint Presentation · 2019. 8. 1. · Parallel lines have the same slope but different...
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The vertex of ∠𝑨𝑩𝑪 is ●B
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symbolic notation:∥
So, a ∥ 𝑏
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symbolic notation:⊥
So, c ⊥ 𝑑
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Circle
The set of all points equidistant from a point in a plane
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congruent
Two figures, segments, triangles, etc. that have the same size, same shape, same measure
∆PQR ≅ ∆LJK
symbolic notation:≅
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acute angle
an angle whose measure is less than 90ᴼ
40ᴼ AWWW… Such a CUTE little angle!
symbolic notation:m∠A = 40ᴼ
A
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right angle
an angle whose measure is exactly 90ᴼ
symbolic notation:m∠B = 90ᴼ
B
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obtuse angle
an angle whose measure is greater than 90ᴼ
symbolic notation:m∠C = 120ᴼ
C120ᴼ
(obtuse angle)
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straight angle
an angle whose measure is exactly 180ᴼ
symbolic notation:m∠ABC = 180ᴼ
BA C
HINT: THERE IS ONLY 1 STRAIGHT ANGLE…(thus a straight angle is different from supplementary angles!!!)
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two angles whose sum is equal to 90ᴼ
12
m∠1 + m∠2 = 90ᴼ
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12
m∠1 + m∠2 = 180ᴼ
two angles whose sum is equal to 180ᴼ
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two angles that share a common ray
C
B
AD
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Vertical Angles
two angles that are opposite of each other and share a common vertex
A
B
C
D
E
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an angle that lies on the exterior of a figure
BA
C