ART Rachaunn is laying out a pattern for a stained glass window. So far he has placed the 13 regular polygons shown. Find the measure of each angle at the circled vertex. Then find the sum of the angles.

180 degrees in a triangle so as triangle is equilateral that angle would be 180/3= 60 degrees

360 degrees in a square. 4 angles in a square. 360/4= 90 degrees

720 degrees in a hexagon. 6 angles in a hexagon. 720/6 = 120 degrees

360 degrees around a point.

so the answer is d.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8