Question

Help pls!! .........................................................................

Answer 1

a)8

b)13

Explanation:

a) ar = c

a^2+b^2=c^2

4^2+7^2=c^2

16+49 = c2

c =
`√(65)` ~8

b) sa= c

a2+b2=c2

7^2 + (15-4)^2

49+121 = c2

c=
`√(170)` = 13

I hope im right!!