A triangle has a base of 13 cm and legs measuring 20 cm. How wide is the base of a similar triangle with legs measuring 32 cm?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

Can someone, me with this.i really need with this

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?