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3 years ago

7

Need help with this

1 answer:

Stells [14]3 years ago

3 0

Answer:

38 = D

Step-by-step explanation:

The 3 angles of a triangle equal 180 degrees

<B + <C + <D = 360

7x+ 12 + 2x+13 + 2x+ 12 =180

Combine terms

11x+37 = 180

Subtract 37 from each side

11x+37-37 = 180-37

11x =143

Divide by 11

11x/11 = 143/11

x =13

We want to find angle D

2x+12 = D

2(13) + 12 = D

26+12 = D

38 = D

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