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Problems
Problem
Problem
If in a
Δ
A
B
C
\Delta ABC
Δ
A
B
C
,
(
s
−
a
)
(
s
−
b
)
=
s
(
s
−
c
)
(s-a)(s-b) = s(s-c)
(
s
−
a
)
(
s
−
b
)
=
s
(
s
−
c
)
, then angle
C
C
C
is equal to a.
90
∘
90^\circ
9
0
∘
b.
45
∘
45^\circ
4
5
∘
c.
30
∘
30^\circ
3
0
∘
d.
60
∘
60^\circ
6
0
∘
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