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3 years ago

Help please !! geometry problems.

Mathematics

1 answer:

Akimi4 [234]3 years ago

3 0

Answer:

see explanation

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

In each question sum the 3 angles and equate to 180

x + 8x + 90 = 180

9x + 90 = 180 ( subtract 90 from both sides )

9x = 90 ( divide both sides by 9 )

x = 10

4x - 5 + 3x + 11 + 90 = 180

7x + 96 = 180 ( subtract 96 from both sides )

7x = 84 ( divide both sides by 7 )

x = 12

4x + 2x + 11 + 19 = 180

6x + 30 = 180 ( subtract 30 from both sides )

6x = 150 ( divide both sides by 6 )

x = 25

5x + 20 + 2x - 5 + 3x - 10 = 180

10x + 5 = 180 ( subtract 5 from both sides )

10x = 175 ( divide both sides by 10 )

x = 17.5

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