Establish Angle Facts Using Arguments
8th Grade Math · Flashcards
8TH GRADE MATH · FLASHCARDS
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QUESTION
What is the sum of the interior angles of any triangle?
QUESTION
If
△
A
B
C
∼
△
D
E
F
\triangle ABC\sim\triangle DEF
△
A
B
C
∼
△
D
E
F
and
m
∠
A
=
42
∘
m\angle A=42^\circ
m
∠
A
=
4
2
∘
, what is
m
∠
D
m\angle D
m
∠
D
?
QUESTION
If
ℓ
1
∥
ℓ
2
\ell_1\parallel \ell_2
ℓ
1
∥
ℓ
2
and a same-side interior angle is
47
∘
47^\circ
4
7
∘
, what is the other same-side interior angle?
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ANSWER
133
∘
133^\circ
13
3
∘
. Same-side interior angles are supplementary:
180
∘
−
47
∘
=
133
∘
180^\circ - 47^\circ = 133^\circ
18
0
∘
−
4
7
∘
=
13
3
∘
.
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