How do we find the area of a circle?

For you to find the area of a circle you only need to know the appropriate formula. The formula to find the are of a circle is "pi times the radius of the circle to the second power".

In the circle world, you will also have to find the circumference. the circumference is how long the circle is, around itself. the formula to find the circumference of a circle is "pi times the diameter" of the circle.

Problem1: find the circumference of a circle with radius of 5.
Problem 2: what's the area of a circle with a diameter of 25pi?


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3/19 - How Do We Find The Area of Regular Polygons?

A regular polygon is a polygon that is equiangular and equilateral.
To find the area of a regular polygon you'll need to know the formula which is A= 1/2 as, where the variable "a" stands for the length called the apothem. The apothem is the perpendicular segment from the center to the side.

PROBLEM: A 6 sided regular polygon (hexagon) is inscribed in a circle of radius 8 cm, find the length of one side of the hexagon

3/12 - How Do We Calculate The Area of Rectangles & Triangles?

• The area of a plane figure is the measure of the region enclosed by the figure you measure.

For you to find the area of a rectangle you just need to know the formula which is: A= B x H, where A stands for Area, B stands for Base and H stands for height.

For you to find the area of a triangle you just need to know the formula which is A= 1/2 B x H where A stands for Area, B for Base and H for Height.

PROBLEM #1: If the area of a rectangle is 34ft square, and the base is 5ft what is the height of the rectangle?

PROBLEM #2: What's the area of a triangle with a height of 25cm and a base of 15cm?