Answer:
B and D
Step-by-step explanation:
I did this manually on some notepaper but my scanner is not working.
The answer is 72 cm^2
I don't know if my answer is completely correct, but I think it's 100. All triangles add up to 180, and an isosceles triangle has 2 equal sides. 40 would be the 2 sides, and 180 subtracted from 80 equals 100.
It is equivalent to 4/6 so yeah yay.
Answer:
1.
31, 37, 43, 49, 55
2.
for nth number the value is 31+6(n-1)
3.
24th number, 169-31=138 and 138/6=23
