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Kay [80]
2 years ago
9

What is the value of y ?

Mathematics
2 answers:
Lilit [14]2 years ago
8 0
Theorem:
In a triangle, the measure of an exterior angle is equal to the sum of the measures of the remote interior angles.

The 88-deg angle is an exterior angle of the triangle.
The two angles labeled y are the remote interior angles to the 88-deg angle.

That means that the sum of the measures of the angles labeled y equals 88.

y + y = 88

2y = 88

y = 44

Answer: C. 44 deg
LuckyWell [14K]2 years ago
5 0

Answer:

Option C is correct

The value of y is, 44^{\circ}

Step-by-step explanation:

Exterior Angle theorem states that the sum of the measures of the two non-adjacent interior angles of the triangle is equal to the measure of an exterior angle.

Label the figure:

In triangle ABC, BC is produced to D, then \angle ACD is the exterior angle , \angle ABC and \angle BAC are the two interior opposite angle.

i.e, \angle ABC+\angle BAC=\angle ACD

From the given figure:

\angle ABC = \angle BAC = y^{\circ} and \angle ACD=88^{\circ}

Then, by the Exterior angle theorem, we calculate the value of y;

y^{\circ}+y^{\circ}=88^{\circ}

Combine like terms:

2y^{\circ}=88^{\circ}

on simplify:

y=44^{\circ}

therefore, the value of y is, 44^{\circ}


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