Answer:
25.
Step-by-step explanation:
I am assuming you only mean the small triangles, not the composite ones.
The second triangle set has 3 triangles on bottom row and 1 on the top - total 4.
The 3rd triangle set has 5 triangles on the bottom , 3 on the next up and 1 on the top - total 9
Following the pattern 4th set will have the number of triaNGLES
7 + 5 + 3 + 1 = 16.
So the 5th will have 9 + 7 + 5 + 3 +1 = 25 triangles.
try that then times it by 12.1
B. -4-1. -4-1=-5, which is the amount of you count the spaces in between.
Hope this helps!
Every flat 4-sided shape is called a quadrilateral,
from 'quad' for 4 and 'lateral' for side.
Pe eriod b. lud is lea.ving my cgcoo.chie hole.
