Respuesta :

The0nlyAl

Okay so, to get C you add the ones inside the triangle together.

42+58=100 Then the last angle will be 80, because when you add the three inside the triangle, you should get 180

42+58+80=180

To get D, you have to subtract 180 and 58, because 58+d will be a straight angle.

180-58=121

To get B and A, you would also have another straight angle (c, b, and a)

180-80=100

I believe that B=A, so, with the remaining 100, both A and B equal 50.

50+50+80=180

Does this help??

StarDolly07

Answer:

a° = 58°

b = 42°

c° = 80°

d° = 122°

Step-by-step explanation:

d° can be found because a straight line has an angle of 180°.

180° - 58° = 122°

Because the angles of a triangle add up to 180°, we can find c°

58° + 42° = 100°. 180° - 100° = 80°

You can find a° subtracting 180 and d°, which is 122. 180° - 122° = 58°

You can do the same thing for b°. 180° - 42° = 138°. 180° - 138° = 42°

You can check this because b° + c° + a° should equal 180°.

58° + 42° + 80° = 180°

I hope this helps :)

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