Question

Help with these three geometry questions please
https://gyazo.com/d65e20d5503bacc3035229094008e237

Answer 1

for question nr. 66 use

sin45° = 5sqrt2 /C

you need to know that sin45° = sqrt2 / 2 and using this

sqrt2 /2 = 5sqrt2 /C so cross multiply will get

C*sqrt2 = 2*5sqrt2 divide both sides by sqrt2 and will get

C = 2*5 so

C = 10

hope helped