Question

Two angles of a triangle are of measures 540 and 630. Find the measure of the third angle.​

Answer 1

Answer:

Step-by-step explanation:

We know that the sum of the interior angles of a triangle is 180 degree.  

Let third angle in all the given triangles be x  

Therefore,

(i) 38 +100   +x   =180  x  =180 −138  

=42  

∘

 

(ii) 116  

∘

+30  

∘

+x  

∘

=180  

∘

 

   x  

∘

=180  

∘

−146  

∘

 

   x  

∘

=34  

∘

 

(iii) 80  

∘

+40  

∘

+x  

∘

=180  

∘

 

   x  

∘

=180  

∘

−120  

∘

 

   x  

∘

=60  

∘

Answer 2

Answer:

63 degrees

Step-by-step explanation:

A1+A2+A3=180

54+63+A3=180

117+A3=180

A3=180-117

A3=63 degrees

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