It is a
r
i
g
h
t
−
∠
e
d
Δ
, as it has got one angle of measure
90
∘
.
Explanation:
Even if it had not been mentioned that the
Δ
has one
90
∘
∠
, we
can infer this fact from the given lengths of the sides.
Observe that,
6
2
+
8
2
=
10
2
; hence, by the converse of
Pythagoras' Theorem, the
∠
opp. to side with length
10
'
is a
right-angle.
Enjoy Maths.!
