Answer:
11. x=10, y=14.1421356237
12. x=12.124355653, y=14
Step-by-step explanation:
11. Use tan and pythagorus
tanA=opposite/adjacent
tan45=x/10
10(1)=x
x=10
a²=b²+c²
y²=x²+10²
y²=10²+10²
y²=100+100
y=√200=14.1421356237
12. Use tan and pythagorus
tanA=opposite/adjacent
tan30=7/x
0.57735026919x=7
x=7/0.57735026919
x=12.124355653
a²=b²+c²
y²=x²+7²
y²=12.124355653²+7²
y²=147+49
y=√196=14
