Question

calcule X nas figuras abaixo

Answer 1

3)a) $H^2=C^2+C^2$

20²= (4x)²+(3x)²

400=16x²+9x²

400=25x²

400/25=x²

16=x²

x=√16

x=4

b) (3x)²= (2x)²+(5√3)²

9x²= 4x²+25*3

9x²= 4x²+ 75

9x²-4x²= 75

5x²=75

x²= 75/5

x²= 15

x = √15