Please help this is for a test and I missed the class where they explained this

Step-by-step explanation:

the sum of the angles 1 and 2 is equal to180 degrees

it doesn't matter how much it will move, their sum it still be 180 degrees, unless the second ski is absolute parallel to the first one and there is no more angle #1

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

answer: r there any options?

step-by-step explanation: