Answer:
c=26
Step-by-step explanation:
So you would use the formula a^2+b^2=c^2
10^2+24^2=c^2
100+576=c^2
C^2=676
The perimeter (P) is the sum of all sides:
21
y = 3x + 9
y = -3x + 12
y=21
there are 2 solutions in total
x^2-4=0
x^2=4
x= ±2<em>i</em>
2x = 40°
3x = 60°
4x = 80°
2x+3x+4x = 180°
9x = 180
x = 20
SO
2x = 2(20) = 40°
3x = 3(20) = 60°
4x = 4(20) = 80°
