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Lesson Example Discussion Quiz: Class Homework

Lesson

Title: Area of Triangle

Grade: 1400-a Lesson: S3-L2

Explanation: Hello Students, time to learn definitions. Let us take turns and read definitions and explain the pictures. Try to remember or memorize the definitions. Pay special attention to the pictures and communicate in your own words.

Lesson:

Definition: Area of Triangle

A triangle is a type of polygon, which has three sides, and the two sides are joined end to end is called the vertex of the triangle. An angle is formed between two sides.

The sum of all three interior angles are equal to 180 degrees.

The exterior angles of a triangle always add up to 360 degrees.

$1$

Explanation:

In this example, we need to find out the area of the triangle using given three sides 5 , 6 , 7 units in length \$\sqrt(s(s-a)(s-b)(s-c))\$ then we get \$6 \sqrt6\$ square units.