I need help with at least one with an explanation the one with best explanation earns brainliest keep in mind i'm 12 so can you like write it in a way i'll understand? plz and ty!

Triangle:

In order for you to solve all of them you need to multiply the base times the height then divide that in half.

example answer;

3 is 68 because you multiply 17 by 8 then divide in half.

Decomposition of the trapezoid to find the area. You first need to separate the parts of the trapezoid that make a triangles. Ex: separate the outer parts so that you're left with triangle/s and a rectangle/square shape in the middle. Find the area of the triangles and the area of the middle square/rectangle and then add that together.

8. 171 I used this formula A=(a+b)h/2  Which is top length+bottom length times height divided by two.

Trapezoid area:

You need to add the top base and the bottom base together then multiply that by the height.

9. 396. I  used the same formula as the last one. which is A=(a+b)h/2.

I hope I could help you :)

Step-by-step explanation:

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation:

step-by-step explanation:

5×5×5+2(8)÷2(2)+3(3)

15+16÷4+9

31÷13

do 31÷13 and u will get ur answer