Week 8 Day 2

What are
we working
on today?

If you have not finished

yesterday's work, you need
to do that first. Then you
need to work on today’s
lesson of area of a circle.

These need to be

completed by the end of

class today.

I can identify the characteristics
of two-dimensional figures and
find the volume of rectangles,
triangles, and circles.

Learning Target

2D Shape Areas

When finding the area for two
dimensional shapes, we have
formulas that help us to find the
area. Depending on the shape
depends on which formula we use.

2D Shape Areas - Example

Finding the area of a
circle is a little different.
Noticed that there is “r =”
in the center of the circle

2D Shape Areas - Example

2D Shape Areas - Example

Diameter: The
distance across the
circle that goes
through the center
of the circle.

2D Shape Areas - Example

When given the diameter,
radius = diameter/2
r = d/2

2D Shape Areas - Example

What is

?

(PI): a mathematical constant that is the ratio of a
circle's circumference to its diameter,
approximately equal to 3.14.

2D Shape Areas - Example

The last different
symbol, we’ve used
while using the
pythagorean theorem.
This means that you
square the radius, or
just multiply the radius
by the radius.

2D Shape Areas

Triangle

Rectangle
A= L * H

Circle

IXL- SKILL PRACTICE

Circle Area Practice and 3D Shapes

Graded as CFU for today
Can work with partners

Academic appropriate language