Proving, Applying Laws of Sines/Cosines
Geometry · Flashcards
GEOMETRY · FLASHCARDS
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QUESTION
Find and correct the error:
A
=
a
b
sin
(
C
)
A=ab\sin(C)
A
=
ab
sin
(
C
)
is used for triangle area.
QUESTION
What area expression results from substituting
h
=
b
sin
(
C
)
h=b\sin(C)
h
=
b
sin
(
C
)
into
A
=
1
2
a
h
A=\frac{1}{2}ah
A
=
2
1
ah
?
QUESTION
What is the valid angle range for an interior triangle angle
C
C
C
?
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ANSWER
0
∘
<
C
<
180
∘
0^\circ<C<180^\circ
0
∘
<
C
<
18
0
∘
. Interior angles must be between 0° and 180°.
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