8th grade math quiz! Please show work! Thank uuu!

Step-by-step explanation:

6) they forget the last step which is to take the square root of the sum

7) a = 4

b = 17

a² + b² = c²

4 ² + 17 ² = c²

16 + 289 = c²

305 = c²

√305 = c

17.464249196572980 = c

8) need to find the length of the last side of the triangle (so the same as (7) )

a²+b²=c²

30²+40²= c²

900 + 1600 = c²

2500 = c²

√2500 = c

50 = c

now we need to find out how many m we saved

original walk = 30+40 = 70

shortcut = 50

meters saved = 70-50 = 20 m

as for 3&4 i don't have time to draw sorry