Question

MAY SOMEONE HELP PLZ!

Answer 1

First pic

`ratio = (62.8)/(2 0) \\ = 3.14`

Second pic

`< c + 2x + (3x + 10) = 180 \\ < c = 180 - 3x - 10 - 2x \\ < c = 170 - 5x`

Answer 2

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°