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MAY SOMEONE HELP PLZ class=

Answer :

Answer:

First pic

[tex]ratio = \frac{62.8}{2 0} \\ = 3.14[/tex]

Second pic

[tex] < c + 2x + (3x + 10) = 180 \\ < c = 180 - 3x - 10 - 2x \\ < c = 170 - 5x[/tex]

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Answer:

Step-by-step explanation:

#1

Circumference equation:

  • C = πd

Circumference to diameter ratio is:

  • C/d = π = 3.14
  • Same result comes from the table
  • Correct choice is B

#2

Sum of angles of a triangle is 180°

  • m∠A + m∠B + m∠C = 180°

A and C are equal angles as opposite sides are congruent.

  • 2(3x + 10) + 2x = 180
  • 6x + 20 + 2x = 180
  • 8x = 160
  • x = 20
  • m∠C = 3*20 + 10 = 70°

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