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Galina-37 [17]
3 years ago
5

Applying Angle Relationships of Isosceles Triangles

Mathematics
2 answers:
soldi70 [24.7K]3 years ago
8 0
(180(total angle measure of triangle)-50(EFG))/2(the other two angles have the same measure)=65


The angle CGE=180=CGF+EGF
180-65=CGF
115=CGF
Ulleksa [173]3 years ago
8 0

we know that

An isosceles triangle has two equals sides and two equals angles

so

EF=GF

m∠EGF=m∠GEF

The sum of the internal angles of a triangle must be 180 degrees

m∠EGF+m∠GEF+m∠EFG=180\°

we have

m∠EFG=50\°

2m∠EGF+50\°=180\°

2m∠EGF=180\°-50\°

2m∠EGF=130\°

m∠EGF=65\°

therefore

<u>the answer Part a) is</u>

the measure of angle EGF is 65\°

Part b) What is the measure of m∠CGF?

we know that

m∠CGF+m∠EGF=180\° ---------> by supplementary angles

substitute values

m∠CGF+65\°=180\°

m∠CGF=180\°-65\°

m∠CGF=115\°

therefore

<u>the answer Part b) is</u>

the measure of angle CGF is 115\°

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