HELP!!WILL GIVE BRAINLIEST

m∠A = 100

m∠C = 50

Step-by-step explanation:

let 'x' = m∠A

let 'x/2' = m∠C

x + x/2 + 30 = 180

3/2x = 150

x = 150(2) / 3

x = 300/3

x = 100

m∠A = 100°

m∠C = 100/2 or 50°

yes

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.