Teniendo en cuenta la propiedad fundamental de las proporciones, comprueba si las siguientes son o no proporciones a) 5/7 = 15/21 b) 20/7 = 5/3 c) 16/8 = 4/2

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm