Answer:
6
Step-by-step explanation:
The ratio of is a constant
=
=
=
That is y = x
When x = 21, then
y = × 21 = 6
Y2-y1 and y=me+b Plzz help me with this
1 answer:
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Answer:
1). Fold reflection symmetries = 5
2). Order of rotational symmetries = 10
3). Smallest angle of rotational symmetry = 36°
Step-by-step explanation:
A decagon has number of fold reflection symmetries = 5
[Fold reflection symmetries are the lines by which we can fold the shape into half]
Order of rotational symmetry of a decagon = 10
[Order of rotational symmetry means number of rotations by which the polygon maps itself in a complete rotation of 360°]
Smallest angle of rotational symmetry for a decagon
=
=
= 36°