3 years ago

So confused pls help me

Mathematics

1 answer:

Gala2k [10]3 years ago

7 0

Answer:

$a=49$

Step-by-step explanation:

The angle having value $(a+49)\textdegree$ is the exterior angle.

Exterior angle of a triangle is equal to the sum of the other two opposite angles.

Hence

$a+49=a+a\\\\a+49=2a\\\\2a=a+49\\\\2a-a=49\\\\a=49$

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