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In , . The exterior angle at vertex measures . What is the measure of…
MATHEMATICS · Single correct · CBSE · Mathematics · Triangles · Triangles
Problem
In
△
X
Y
Z
\triangle XYZ
△
X
Y
Z
,
∠
X
=
∠
Y
\angle X = \angle Y
∠
X
=
∠
Y
. The exterior angle at vertex
Z
Z
Z
measures
140
∘
140^{\circ}
14
0
∘
. What is the measure of
∠
X
\angle X
∠
X
? (a)
20
∘
20^{\circ}
2
0
∘
(b)
40
∘
40^{\circ}
4
0
∘
(c)
70
∘
70^{\circ}
7
0
∘
(d)
50
∘
50^{\circ}
5
0
∘
Related theory
Properties of Triangles
Triangle Properties
Triangle inequalities
Triangles
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