Math Is Fun Forum

mathxyz

Member

From: Brooklyn, NY

Registered: 2024-02-24

Posts: 1,053

Christmas Tree Ornament

A Christmas tree ornament is in the shape of a semicircle on top of a triangle. How many square centimeters (cm^2) of copper is required to make the ornament if the height of the triangle is 6 cm and the base is 4 cm?

Let me see.

I need to find the area of the triangle and semicircle.

Area = (bh/2) + (1/2)(pi)(r)^2, where b = base of triangle, h = height of triangle, and r = radius of semicircle.

Am I right here?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,637

Re: Christmas Tree Ornament

Yes. Are you able to assign the right numbers to a, b  and r?

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

mathxyz

Member

From: Brooklyn, NY

Registered: 2024-02-24

Posts: 1,053

Re: Christmas Tree Ornament

Yes. Are you able to assign the right numbers to a, b  and r?

Bob

Thank you, Bob.