598+20+987+78+90+87+80+60+70+90

2,160

Step-by-step explanation:

598 + 20 = 618

618 + 987 = 1,605

1,605 + 78 = 1,683

1,683 + 90 = 1,773

1,773 + 87 = 1,860

1,860 + 80 = 1,940

1,940 + 60 = 2,000

2000 + 70 = 2,070

2070 + 90 = 2,160

hope this !

step-by-step explanation:

d = distance between moon and sun, which in this problem is the hypotenuse of a right triangle.  

the distance y is the side opposite to angle x in the right triangle.   use the definition of the sine function from basic trigonometry.

sin(x) = y/d ⇒

d = y/sin(x)

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'.