The answer is 19.6 cm^2
you should find the height of the triangle by heron formula: it will be 9.8
so the area is

good luck
You didn’t give the rest of the answer hun
The answers are -16 and 9. Hopefully this helps :D
Answer:
?????.... hii erica herrrr
Answer:
Hello,
Answer 163
Step-by-step explanation:
1,7,16,28,43,..., 10th term=?
