Which letter in the word HAPPY has an order 2 rotational symmetry?

H

Step-by-step explanation:

Here only letter H maps onto itself 2 times in a rotation of 360°i.e.one at angle  180° and one at angle 360°.

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb

a

step-by-step explanation:

its wrong