SaiBook.us Geometry

Example

Title: Circle

Grade: 4-a Lesson: S2-L3

Explanation: The best way to understand geometry is by looking at some examples. Take turns and read each example for easy understanding.

Examples:

If a circle has a radius of 6 cm, what is the length of its longest chord?

Step 1a

The radius given is 6 cm.

$1a$

Explanation: The given measurement is a radius of 6 cm.

Step 1b

The longest chord is the diameter of the circle.

Formula for diameter is(D) = 2r

Explanation: The diameter of a circle is equal to twice the radius (D = 2r).

Step 1c

Substitute the value D = \$2 \times 6\$ = 12 cm.

The diameter of a circle is 12 cm.

Explanation: The diameter of a circle is 12 cm when its value is twice 6 cm or D = \$2 \times 6\$ = 12 cm.