2 years ago

Please help.. no links

Mathematics

2 answers:

I am Lyosha [343]2 years ago

6 0

Answer:

D = 127°

Step-by-step explanation:

We know that sum of all angles in a triangle is 180°.

Thus, the measure of third angle will be -

180 - (85 + 42)

180 - 127

= 53°

We also know that sum of adjacent angles is 180°. So,

D = 180° - third angle

D = 180° - 53°

D = 127°

AnnZ [28]2 years ago

4 0

Answer:

∠ D = 127°

Step-by-step explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ D is an exterior angle of the triangle , then

∠ D = 85° + 42° = 127°

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