Each angle measure of a regular polygon is 60°. What is the polygon?

square
quadrilateral
equilateral triangle
hexagon

Equilateral triangle

Step-by-step explanation:

Sum of all the angles jn a triangle is 180°

Therefore, 180/60=3(no.of sides)

You can see that triangle has 3 sides.

Therefore you can conclude that triangle is the answer. Pls note that if only 1 triangle is mentioned in the question then this will be your answer like thw one above. But if the question is which triangle has all of its angles has 60° then your answer will be equilateral triangle. You can also make a note that sum of all the angles of a triangle is 60°. I think i typed a lot for the explanation although i dont like teaching much. But still i hope this will be helpul.

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0