Answer:
3240°
Step-by-step explanation:
For a regular icosagon,
sum of interior angles measure=180(n-2)°
180(20-2)
180(18)=3240°
Answer:
Step-by-step explanation:
(a). B, C and D are the distinct points that are collinear.
(b). FC and BD are the distinct lines that intersect each other at a point C.
(c). E, F, C and A are the points that are coplanar (on the same plane).
(d). Another name for plane X is plane AEF. (Since a plane is defined by the three distinct points on the same plane.
The square root of four is two. To find the square root of four you find out what number, when multiplied by itself will get four. In this case, 2×2=4.
Step-by-step explanation:
c=144°(vertically opposite angle)
b+c=180°(straight angle)
b+144=180
b=180-144
b=36°
